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((short description|Historic party affiliation among elected officials in the US state of Pennsylvania))
((More citations needed|date=September 2020))
==Partisan identification in the electorate==
On July 10, 2023, the Pennsylvania Department of State reported that there were 3,890,435 (45.2%) registered Democrats, 3,432,657 (39.9%) registered Republicans, 929,364 (10.8%) registered unaffiliated and 346,280 (4.0%) registered with other parties.<ref>((cite web |publisher=Pennsylvania Department of State |url=https://www.dos.pa.gov/VotingElections/OtherServicesEvents/VotingElectionStatistics/Pages/VotingElectionStatistics.aspx |title=Voting and Election Statistics, Current Registration Statistics |accessdate=July 12, 2023))</ref>

==Partisan affiliation of elected officials==
The following table indicates the party of elected officials in the [[U.S. state]] of [[Pennsylvania]]:
* [[List of governors of Pennsylvania|Governor]]
* [[Lieutenant Governor of Pennsylvania|Lieutenant governor]]
* [[Pennsylvania Attorney General|Attorney general]]
* [[Pennsylvania Auditor General|State auditor general]]
* [[Pennsylvania Treasurer|State treasurer]]

The table also indicates the historical party composition in the:
* [[Pennsylvania State Senate|State senate]]
* [[Pennsylvania House of Representatives|State house of representatives]]
* [[List of United States senators from Pennsylvania|State delegation to the United States Senate]]
* [[List of United States representatives from Pennsylvania|State delegation to the United States House of Representatives]]

Following the [[2020 United States census|2020 Census]], Pennsylvania lost one seat in the U.S. House of Representatives. As a result, starting with the [[2022 United States elections|general election of 2022]], Pennsylvania sent 17 members to the house, and beginning with the [[2024 United States elections|general election of 2024]] will have 19 electoral votes.

=== 1777–1790 ===
{| class="wikitable" style="text-align:center"
! rowspan=2 |Year!! colspan=2 |Executive offices!![[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |United States Congress!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[Supreme Executive Council of the Commonwealth of Pennsylvania|President]]((efn|name=exec|From 1777 to 1790, Pennsylvania had a series of presidents and vice presidents of The Supreme Council.))!![[Supreme Executive Council of the Commonwealth of Pennsylvania|Vice President]]((efn|name=exec))!![[Supreme Executive Council of the Commonwealth of Pennsylvania|Executive Council]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]
|- style="height:2em"
!1777
|((Party shading/Democratic/Hold))|[[Thomas Wharton Jr.]] <small>(((abbr|CS|Constitutionalist Society)))</small>
| rowspan=2 ((Party shading/Democratic/Hold))|[[George Bryan]] <small>(((abbr|CS|Constitutionalist Society)))</small>
|((Party shading/Democratic/Hold))|51((abbr|CS|Constitutionalist Society)), 15((abbr|RS|Republican Society)), 6?
| colspan=4 rowspan=12 |''began in 1789''
|- style="height:2em"
!1778
|((Party shading/Democratic/Hold))|[[George Bryan]] <small>(((abbr|CS|Constitutionalist Society)))</small>
|((Party shading/Democratic/Hold))|54((abbr|CS|Constitutionalist Society)), 7?, 5((abbr|RS|Republican Society))
|- style="height:2em"
!1779
| rowspan=3 ((Party shading/Democratic/Hold))|[[Joseph Reed (politician)|Joseph Reed]] <small>(((abbr|CS|Constitutionalist Society)))</small>
|[[Matthew Smith (Pennsylvania statesman)|Matthew Smith]]
|((Party shading/Democratic/Hold))|43((abbr|CS|Constitutionalist Society)), 26((abbr|RS|Republican Society)), 3?
|- style="height:2em"
!1780
| rowspan=2 ((Party shading/Independent (United States)))|[[William Moore (Pennsylvania politician, died 1793)|William Moore]] <small>(I)</small>
|((Party shading/Democratic/Hold))|51((abbr|CS|Constitutionalist Society)), 14((abbr|RS|Republican Society)), 7?
|- style="height:2em"
!1781
|((Party shading/Democratic/Hold))|41((abbr|CS|Constitutionalist Society)), 31((abbr|RS|Republican Society))
|- style="height:2em"
!1782
|((Party shading/Independent (United States)))|[[William Moore (Pennsylvania politician, died 1793)|William Moore]] <small>(I)</small>
|((Party shading/Democratic/Hold))|[[James Potter (Pennsylvania politician)|James Potter]] <small>(((abbr|CS|Constitutionalist Society)))</small>
|((Party shading/Democratic/Hold))|38((abbr|CS|Constitutionalist Society)), 36((abbr|RS|Republican Society))
|- style="height:2em"
!1783
| rowspan=3 ((Party shading/Republican/Hold))|[[John Dickinson]] <small>(((abbr|RS|Republican Society)))</small>
| rowspan=2 ((Party shading/Republican/Hold))|[[James Ewing (Pennsylvania politician)|James Ewing]] <small>(((abbr|RS|Republican Society)))</small>
|((Party shading/Republican/Hold))|39((abbr|RS|Republican Society)), 34((abbr|CS|Constitutionalist Society)), 1?
|- style="height:2em"
!1784
|((Party shading/Republican/Hold))|44((abbr|RS|Republican Society)), 29((abbr|CS|Constitutionalist Society))
|- style="height:2em"
!1785
|((Party shading/Democratic/Hold))|[[James Irvine (Pennsylvania politician)|James Irvine]] <small>(((abbr|CS|Constitutionalist Society)))</small>
|((Party shading/Democratic/Hold))|56((abbr|CS|Constitutionalist Society)), 18((abbr|RS|Republican Society))
|- style="height:2em"
!1786
| rowspan=3 ((Party shading/Independent (United States)))|[[Benjamin Franklin]] <small>(I)</small>
| rowspan=2 |[[Charles Biddle]]
|((Party shading/Republican/Hold))|38((abbr|RS|Republican Society)), 37((abbr|CS|Constitutionalist Society))
|- style="height:2em"
!1787
|((Party shading/Republican/Hold))|41((abbr|RS|Republican Society)), 28((abbr|CS|Constitutionalist Society))
|- style="height:2em"
!1788
|[[Peter Muhlenberg]]
|((Party shading/Republican/Hold))|37((abbr|RS|Republican Society)), 32((abbr|CS|Constitutionalist Society))
|- style="height:2em"
!1789
| rowspan=2 ((Party shading/Republican/Hold))|[[Thomas Mifflin]] <small>(((abbr|RS|Republican Society)))</small>
| rowspan=2 |[[George Ross (Pennsylvania statesman)|George Ross]]
|((Party shading/Republican/Hold))|47((abbr|RS|Republican Society)), 22((abbr|CS|Constitutionalist Society))
| rowspan=2 ((Party shading/Anti-Administration)) |[[William Maclay (Pennsylvania senator)|William Maclay]] <small>(AA)</small>
| rowspan=2 ((Party shading/Pro-Administration)) |[[Robert Morris (financier)|Robert Morris]] <small>(PA)</small>
| rowspan=2 ((Party shading/Pro-Administration)) |6PA, 2AA
| rowspan=2 ((Party shading/Independent (United States)))|[[George Washington]] <small>(I)</small> /<br />[[John Adams]] <small>(F)</small> ((Aye))
|- style="height:2em"
!1790
|((Party shading/Republican/Hold))|42((abbr|RS|Republican Society)), 27((abbr|CS|Constitutionalist Society))
|- style="height:2em"
! rowspan=2 |Year!![[Supreme Executive Council of the Commonwealth of Pennsylvania|President]]!![[Supreme Executive Council of the Commonwealth of Pennsylvania|Vice President]]!![[Supreme Executive Council of the Commonwealth of Pennsylvania|Executive Council]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan=2 |Executive offices!![[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Pennsylvania|United States Congress]]
|}

=== 1791–1872 ===
{| class="wikitable" style="text-align:center"
! rowspan=2 |Year!! colspan=2 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |United States Congress!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[List of governors of Pennsylvania|Governor]]!![[Pennsylvania Auditor General|Auditor General]]!![[Pennsylvania State Senate|State Senate]]
![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]
|- style="height:2em"
!1791
| rowspan=10 ((Party shading/Federalist)) |[[Thomas Mifflin]] <small>(F)</small>
| rowspan=63 |''not an elected office''
| rowspan=2 ((Party shading/Federalist)) |10F, 8DR
| ((Party shading/Federalist)) |36F, 33DR
| rowspan=3 |''vacant''
| rowspan=5 ((Party shading/Pro-Administration))|[[Robert Morris (financier)|Robert Morris]] <small>(PA)</small>
| rowspan=2 ((Party shading/Tie)) |4PA, 4AA
|
|- style="height:2em"
!1792
| rowspan=2 ((Party shading/Federalist)) |42F, 27DR
| rowspan=5 ((Party shading/Independent (United States)))|[[George Washington]] <small>(I)</small> /<br />[[John Adams]] <small>(F)</small> ((Aye))
|- style="height:2em"
!1793
| ((Party shading/Tie)) |9F, 9DR((efn|A Federalist, Anthony Morris, was elected as Speaker of the chamber.<ref>((cite web|title=Anthony Morris|url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4715&body=S|access-date=2021-06-24|website=The official website for the Pennsylvania General Assembly.|language=English))</ref>))
| rowspan=3 ((Party shading/Anti-Administration)) |8AA, 5PA
|- style="height:2em"
! rowspan=2 |1794
| rowspan=2 ((Party shading/Federalist)) |10F, 8DR
| rowspan=2 ((Party shading/Federalist)) |48F, 21DR
| ((Party shading/Anti-Administration)) |[[Albert Gallatin]] <small>(AA)</small>
|- style="height:2em"
| ((Party shading/Pro-Administration)) |[[James Ross (Pennsylvania politician)|James Ross]] <small>(PA)</small>
|- style="height:2em"
!1795
| ((Party shading/Federalist)) |14F, 10DR
| ((Party shading/Federalist)) |49F, 29DR
| rowspan=9 ((Party shading/Federalist)) |[[James Ross (Pennsylvania politician)|James Ross]] <small>(F)</small>
| rowspan=6 ((Party shading/Federalist)) |[[William Bingham]] <small>(F)</small>
| ((Party shading/Democratic-Republican)) |8DR, 5F
|- style="height:2em"
!1796
| rowspan=4 ((Party shading/Federalist)) |15F, 9DR
| ((Party shading/Federalist)) |45F, 33DR
| ((Party shading/Democratic-Republican)) |7DR, 6F
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Thomas Jefferson]] <small>(DR)</small> ((Nay)) /<br /> [[John Adams]] <small>(F)</small> ((Nay))
|- style="height:2em"
!1797
| ((Party shading/Federalist)) |44F, 34DR
| rowspan=2 ((Party shading/Democratic-Republican)) |8DR, 5F
|- style="height:2em"
!1798
| ((Party shading/Federalist)) |41F, 37DR
|- style="height:2em"
!1799
| ((Party shading/Federalist)) |47F, 31DR
| rowspan=2 ((Party shading/Democratic-Republican)) |9DR, 4F
|- style="height:2em"
!1800
| rowspan=7 ((Party shading/Democratic-Republican)) |[[Thomas McKean]] <small>(DR)</small>
| ((Party shading/Federalist)) |16F, 8DR
| ((Party shading/Democratic-Republican)) |41DR, 37F
| rowspan=5 ((Party shading/Democratic-Republican)) |[[Thomas Jefferson]] <small>(DR)</small> ((Aye)) /<br /> [[John Adams]] <small>(F)</small> ((Nay))
|- style="height:2em"
! rowspan=2 |1801
| rowspan=2 ((Party shading/Federalist)) |13F, 11DR
| rowspan=2 ((Party shading/Democratic-Republican)) |55DR, 23F
| ((Party shading/Democratic-Republican)) |[[Peter Muhlenberg]] <small>(DR)</small>
| rowspan=3 ((Party shading/Democratic-Republican)) |10DR, 3F
|- style="height:2em"
| rowspan=6 ((Party shading/Democratic-Republican)) |[[George Logan (Pennsylvania politician)|George Logan]] <small>(DR)</small>
|- style="height:2em"
!1802
| ((Party shading/Democratic-Republican)) |17DR, 8F
| ((Party shading/Democratic-Republican)) |71DR, 15F
|- style="height:2em"
!1803
| ((Party shading/Democratic-Republican)) |21DR, 4F
| ((Party shading/Democratic-Republican)) |77DR, 9F
| rowspan=6 ((Party shading/Democratic-Republican)) |[[Samuel Maclay]] <small>(DR)</small>
| rowspan=2 ((Party shading/Democratic-Republican)) |18DR
|- style="height:2em"
!1804
| ((Party shading/Democratic-Republican)) |24DR, 1F
| ((Party shading/Democratic-Republican)) |81DR, 5F
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Thomas Jefferson]]/<br />[[George Clinton (vice president)|George Clinton]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1805
| ((Party shading/Democratic-Republican)) |25DR
| ((Party shading/Democratic-Republican)) |78DR, 8F
| rowspan=2 ((Party shading/Democratic-Republican)) |17DR, 1F
|- style="height:2em"
!1806
| rowspan=3 ((Party shading/Fusion))|[[Thomas McKean]] <small>(Quid)</small>
| ((Party shading/Fusion)) |15Const, 10DR((efn|name=coalition|The Federalists and Quids, who were moderates within the [[Democratic-Republican Party]], formed a coalition in the 1805 election and called themselves the Constitutionalists; when they achieved a majority, they organized the chamber together, and this coalition continued in succeeding elections.<ref>((cite web |url=https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/securing-the-republic-1800-1815-11/divisions-in-the-republican-party-97/john-randolph-and-the-old-republicans-524-3388/ |title=John Randolph and the Old Republicans
|date=July 21, 2015 |website=Boundless |url-status=dead |archive-url=https://web.archive.org/web/20150919125505/https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/securing-the-republic-1800-1815-11/divisions-in-the-republican-party-97/john-randolph-and-the-old-republicans-524-3388/ |archive-date=September 19, 2015 ))</ref>))
| ((Party shading/Fusion)) |53Const, 33DR((efn|name=coalition))
|- style="height:2em"
!1807
| ((Party shading/Fusion)) |13Const, 12DR((efn|name=coalition))
| ((Party shading/Democratic-Republican)) |46DR, 40Const((efn|name=coalition))
| rowspan=6 ((Party shading/Democratic-Republican)) |[[Andrew Gregg]] <small>(DR)</small>
| rowspan=2 ((Party shading/Democratic-Republican)) |15DR, 3F
|- style="height:2em"
!1808
| ((Party shading/Democratic-Republican)) |14DR, 7Quid, 4F
| ((Party shading/Democratic-Republican)) |43DR, 23F, 20Quid((efn|Elected [[Nathaniel Boileau]], a Democratic-Republican, as Speaker.))
| rowspan=4 ((Party shading/Democratic-Republican)) |[[James Madison]]/<br />[[George Clinton (vice president)|George Clinton]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1809
| rowspan=9 ((Party shading/Democratic-Republican)) |[[Simon Snyder]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |19DR, 7Quid, 5F
| ((Party shading/Democratic-Republican)) |74DR, 21F
| rowspan=5 ((Party shading/Democratic-Republican)) |[[Michael Leib]] <small>(DR)</small>
| rowspan=2 ((Party shading/Democratic-Republican)) |16DR, 2F
|- style="height:2em"
!1810
| ((Party shading/Democratic-Republican)) |22DR, 6F, 3Quid
| ((Party shading/Democratic-Republican)) |73DR, 15F, 7Quid
|- style="height:2em"
!1811
| ((Party shading/Democratic-Republican)) |21DR, 7F, 3Quid
| ((Party shading/Democratic-Republican)) |72DR, 17F, 6Quid
| rowspan=2 ((Party shading/Democratic-Republican)) |17DR, 1F
|- style="height:2em"
!1812
| rowspan=2 ((Party shading/Democratic-Republican)) |26DR, 5F
| ((Party shading/Democratic-Republican)) |84DR, 11F
| rowspan=4 ((Party shading/Democratic-Republican)) |[[James Madison]]/<br />[[Elbridge Gerry]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1813
| ((Party shading/Democratic-Republican)) |77DR, 18F
| rowspan=6 ((Party shading/Democratic-Republican)) |[[Abner Lacock]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |22DR, 1F
|- style="height:2em"
!1814
| ((Party shading/Democratic-Republican)) |25DR, 6F
| ((Party shading/Democratic-Republican)) |85DR, 10F
| rowspan=7 ((Party shading/Democratic-Republican)) |[[Jonathan Roberts (politician)|Jonathan Roberts]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |21DR, 2F
|- style="height:2em"
!1815
| ((Party shading/Democratic-Republican)) |21DR, 10F
| ((Party shading/Democratic-Republican)) |71DR, 24F
| rowspan=5 ((Party shading/Democratic-Republican)) |19DR, 4F
|- style="height:2em"
!1816
| rowspan=3 ((Party shading/Democratic-Republican)) |19DR, 12F
| ((Party shading/Democratic-Republican)) |71DR, 26F
| rowspan=8 ((Party shading/Democratic-Republican)) |[[James Monroe]]/<br />[[Daniel D. Tompkins]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1817
| ((Party shading/Democratic-Republican)) |57DR, 30F, 10Quid
|- style="height:2em"
!1818
| rowspan=3 ((Party shading/Democratic-Republican)) |[[William Findlay (governor)|William Findlay]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |55DR, 42F((efn|Some sources begin to cite the Federalists at the state level as Independent Republicans starting with this year.))
|- style="height:2em"
!1819
| ((Party shading/Democratic-Republican)) |20DR, 11F
| ((Party shading/Democratic-Republican)) |64DR, 33F
| rowspan=6 ((Party shading/Democratic-Republican)) |[[Walter Lowrie (politician)|Walter Lowrie]] <small>(DR)</small>
|- style="height:2em"
!1820
| ((Party shading/Democratic-Republican)) |23DR, 6F, 2Quid
| ((Party shading/Democratic-Republican)) |67DR, 24F, 6Quid
| ((Party shading/Democratic-Republican)) |18DR, 5F
|- style="height:2em"
!1821
| rowspan=3 ((Party shading/Democratic-Republican)) |[[Joseph Hiester]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |20DR, 11F
| ((Party shading/Federalist)) |52F, 45DR
|''vacant''
| ((Party shading/Democratic-Republican)) |15DR, 8F
|- style="height:2em"
!1822
| ((Party shading/Democratic-Republican)) |17DR, 14F
| ((Party shading/Democratic-Republican)) |67DR, 30F
| rowspan=3 ((Party shading/Democratic-Republican)) |[[William Findlay (governor)|William Findlay]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |16DR, 7F
|- style="height:2em"
!1823
| ((Party shading/Democratic-Republican)) |23DR, 10F
| ((Party shading/Democratic-Republican)) |71DR, 29F
| rowspan=2 ((Party shading/Democratic-Republican)) |20DR, 6F
|- style="height:2em"
!1824
| rowspan=6 ((Party shading/Democratic-Republican)) |[[John Andrew Shulze]] <small>(DR)</small>
| ((Party shading/Democratic-Republican)) |21DR, 11F, 1?
| ((Party shading/Democratic-Republican)) |77DR, 23F
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Andrew Jackson]]/<br />[[John C. Calhoun]] <small>(DR)</small> ((Nay))
|- style="height:2em"
!1825
| ((Party shading/Democratic-Republican)) |26DR, 7F
| ((Party shading/Democratic-Republican)) |79DR, 21F
| rowspan=2 ((Party shading/Jacksonian)) |[[William Findlay (governor)|William Findlay]] <small>(J)</small>
| rowspan=6 ((Party shading/National Republican)) |[[William Marks (politician)|William Marks]] <small>(NR)</small>
| ((Party shading/Jacksonian)) |14J, 11DR, 1F
|- style="height:2em"
!1826
| rowspan=2 ((Party shading/Democratic-Republican)) |27DR, 6F
| ((Party shading/Democratic-Republican)) |77DR, 23F
| ((Party shading/Jacksonian)) |17J, 9DR
|- style="height:2em"
!1827
| ((Party shading/Democratic-Republican)) |74DR, 26F
| rowspan=5 ((Party shading/Jacksonian)) |[[Isaac D. Barnard]] <small>(J)</small>
| rowspan=2 ((Party shading/Jacksonian)) |22J, 3DR, 1NR
|- style="height:2em"
!1828
| rowspan=2 ((Party shading/Jacksonian)) |26J, 7NR
| ((Party shading/Jacksonian)) |76J, 22NR, 2&nbsp;vac.
| rowspan=4 ((Party shading/Democratic)) |[[Andrew Jackson]]/<br />[[John C. Calhoun]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1829
| ((Party shading/Jacksonian)) |89J, 11NR
| rowspan=2 ((Party shading/Jacksonian)) |24J, ((nowrap|1A-M)), 1NR
|- style="height:2em"
!1830
| rowspan=6 ((Party shading/Jacksonian)) |[[George Wolf]] <small>(J)</small>
| ((Party shading/Jacksonian)) |26J, 6NR, ((nowrap|1A-M))
| ((Party shading/Jacksonian)) |87J, ((nowrap|13A-M))
|- style="height:2em"
!1831
| ((Party shading/Jacksonian)) |25J, 5NR, ((nowrap|4A-M))
| ((Party shading/Jacksonian)) |72J, ((nowrap|28A-M))
| rowspan=4 ((Party shading/Jacksonian)) |[[William Wilkins (American politician)|William Wilkins]] <small>(J)</small>
| rowspan=2 ((Party shading/Jacksonian)) |17J, ((nowrap|7A-M)), 2NR
|- style="height:2em"
!1832
| ((Party shading/Jacksonian)) |23J, ((nowrap|6A-M)), 4NR
| ((Party shading/Jacksonian)) |74J, ((nowrap|22A-M)), 4NR
| ((Party shading/Jacksonian)) |[[George M. Dallas]] <small>(J)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Andrew Jackson]]/<br />[[Martin Van Buren]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1833
| ((Party shading/Jacksonian)) |22J, ((nowrap|9A-M)), 2NR
| ((Party shading/Jacksonian)) |61J, ((nowrap|33A-M)), 5NR, 1?
| rowspan=4 ((Party shading/Jacksonian)) |[[Samuel McKean]] <small>(J)</small>
| rowspan=2 ((Party shading/Jacksonian)) |14J, ((nowrap|10A-M)), 4NR
|- style="height:2em"
!1834
| ((Party shading/Jacksonian)) |24J, ((nowrap|7A-M)), 2NR
| ((Party shading/Jacksonian)) |64J, ((nowrap|25A-M)), 11NR
|- style="height:2em"
!1835
| ((Party shading/Jacksonian)) |25J, ((nowrap|6A-M)), 2W
| ((Party shading/Jacksonian)) |62J, ((nowrap|27A-M)), 11W
| rowspan=2 ((Party shading/Jacksonian)) |[[James Buchanan]] <small>(J)</small>
| rowspan=2 ((Party shading/Jacksonian)) |17J, ((nowrap|7A-M)), 4NR
|- style="height:2em"
!1836
| rowspan=3 ((Party shading/Anti-Masonic)) |[[Joseph Ritner]] <small>(((nowrap|A-M)))</small>
| ((Party shading/Democratic)) |23D, ((nowrap|9A-M)), 1W
| ((Party shading/Anti-Masonic)) |((nowrap|72A-M/W)), 28D
| rowspan=4 ((Party shading/Democratic)) |[[Martin Van Buren]]/<br />[[Richard Mentor Johnson]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1837
| ((Party shading/Whig)) |15D, 12W, ((nowrap|6A-M))((efn|The Whigs and Anti-Masons formed a coalition to govern the chamber.))
| ((Party shading/Democratic)) |72D, ((nowrap|21A-M)), 7W
| rowspan=2 ((Party shading/Democratic)) |[[Samuel McKean]] <small>(D)</small>
| rowspan=8 ((Party shading/Democratic)) |[[James Buchanan]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |16D, ((nowrap|7A-M)), 3W, 2J
|- style="height:2em"
!1838
| ((Party shading/Whig)) |19W, 14D
| rowspan=2 ((Party shading/Democratic)) |56D, 44W
|- style="height:2em"
!1839
| rowspan=6 ((Party shading/Democratic)) |[[David R. Porter]] <small>(D)</small>
| ((Party shading/Whig)) |18W, 15D
|''vacant''
| rowspan=2 ((Party shading/Democratic)) |17D, 6W, ((nowrap|5A-M))
|- style="height:2em"
!1840
| ((Party shading/Democratic)) |17D, 16W
| ((Party shading/Democratic)) |69D, 31W
| rowspan=12 ((Party shading/Democratic)) |[[Daniel Sturgeon]] <small>(D)</small>
| rowspan=4 ((Party shading/Whig)) |[[William Henry Harrison]]/<br />[[John Tyler]] <small>(W)</small> ((Aye))
|- style="height:2em"
!1841
| ((Party shading/Whig)) |20W, 13D
| ((Party shading/Whig)) |55W, 45D
| rowspan=2 ((Party shading/Democratic)) |15D, 13W
|- style="height:2em"
!1842
| ((Party shading/Whig)) |17W, 16D
| ((Party shading/Democratic)) |64D, 34W, 2((abbr|WM|Workingmen's Party))
|- style="height:2em"
!1843
| ((Party shading/Democratic)) |19D, 14W
| ((Party shading/Democratic)) |57D, 40W, 2((abbr|WM|Workingmen's Party)), 1I
| ((Party shading/Tie)) |12D, 12W
|- style="height:2em"
!1844
| ((Party shading/Democratic)) |22D, 11W
| ((Party shading/Democratic)) |58D, 42W
| ((Party shading/Whig)) |13W, 11D
| rowspan=4 ((Party shading/Democratic)) |[[James K. Polk]]/<br />[[George M. Dallas]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1845
| rowspan=4 ((Party shading/Democratic)) |[[Francis R. Shunk]] <small>(D)</small>
| ((Party shading/Democratic)) |21D, 11W, 1KN
| ((Party shading/Democratic)) |51D, 41W, 8KN
| rowspan=5 ((Party shading/Democratic)) |[[Simon Cameron]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic))|12D, 10W, 2KN
|- style="height:2em"
!1846
| rowspan=2 ((Party shading/Whig)) |18W, 14D, 1KN
| ((Party shading/Democratic)) |67D, 33W
|- style="height:2em"
!1847
| ((Party shading/Whig)) |56W, 44D
| ((Party shading/Whig)) |16W, 7D, 1KN
|- style="height:2em"
! rowspan=2 |1848
| rowspan=2 ((Party shading/Whig)) |19W, 14D
| rowspan=2 ((Party shading/Democratic)) |64D, 36W
| rowspan=2 ((Party shading/Whig)) |15W, 8D, 1KN
| rowspan=5 ((Party shading/Whig)) |[[Zachary Taylor]]/<br />[[Millard Fillmore]] <small>(W)</small> ((Aye))
|- style="height:2em"
| rowspan=4 ((Party shading/Whig)) |[[William F. Johnston]] <small>(W)</small>
|- style="height:2em"
!1849
| ((Party shading/Whig)) |21W, 12D
| ((Party shading/Democratic)) |50D, 45W, 5KN((efn|A Democrat, [[William F. Packer]], was elected as Speaker, and Democrats organized the chamber.))
| rowspan=6 ((Party shading/Whig)) |[[James Cooper (Pennsylvania politician)|James Cooper]] <small>(W)</small>
| rowspan=2 ((Party shading/Tie)) |11W, 11D, 1KN, 1FS
|- style="height:2em"
!1850
| ((Party shading/Democratic)) |17D, 16W
| ((Party shading/Democratic)) |59D, 41W
|- style="height:2em"
!1851
| rowspan=6 ((Party shading/Democratic)) |[[Ephraim Banks]] <small>(D)</small>
| ((Party shading/Coalition)) |16W, 16D, 1I((efn|A Whig, Benjamin Matthias, was elected as Speaker of the Senate on the 7th Ballot.<ref>((Cite book|url=https://books.google.com/books?id=uyBNAAAAYAAJ|title=Journal of the Senate of the Commonwealth of Pennsylvania|date=1851|language=en|pages=8–9))</ref>))
| ((Party shading/Democratic)) |60D, 36W, 2ID, 1IW, 1&nbsp;vac.
| rowspan=6 ((Party shading/Democratic)) |[[Richard Brodhead]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |15D, 9W
|- style="height:2em"
!1852
| rowspan=3 ((Party shading/Democratic)) |[[William Bigler]] <small>(D)</small>
| ((Party shading/Whig)) |17W, 16D
| ((Party shading/Democratic)) |58D, 37W, 5KN
| rowspan=4 ((Party shading/Democratic)) |[[Franklin Pierce]]/<br />[[William R. King]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1853
| ((Party shading/Whig)) |17W, 15D, 1KN
| ((Party shading/Democratic)) |62D, 38W
| rowspan=2 ((Party shading/Democratic)) |16D, 9W
|- style="height:2em"
!1854
| ((Party shading/Democratic)) |18D, 14W, 1KN
| ((Party shading/Democratic)) |70D, 26W, 4KN
|- style="height:2em"
!1855
| rowspan=3 ((Party shading/Whig)) |[[James Pollock (American politician)|James Pollock]] <small>(W)</small>
| ((Party shading/Democratic)) |17D, 15W, 1KN
| ((Party shading/Coalition)) |46W, 32D, 22KN((efn|A Whig, Henry K. Strong, was elected in a coalition between the Whigs and Know-Nothings.))
|''vacant''
| rowspan=2 ((Party shading/Opposition)) |13O, 7D, 3W, 1R, 1KN
|- style="height:2em"
!1856
| ((Party shading/Democratic)) |17D, 16Fus
| ((Party shading/Democratic)) |66D, 34Fus
| rowspan=5 ((Party shading/Democratic)) |[[William Bigler]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[James Buchanan]]/<br />[[John C. Breckinridge]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1857
| rowspan=3 ((Party shading/Democratic)) |[[Jacob Fry Jr.]] <small>(D)</small>
| ((Party shading/Opposition)) |18Fus, 15D
| ((Party shading/Democratic)) |53D, 47Fus
| rowspan=4 ((Party shading/Republican)) |[[Simon Cameron]] <small>(R)</small>
| ((Party shading/Democratic)) |15D, 10R
|- style="height:2em"
!1858
| rowspan=3 ((Party shading/Democratic)) |[[William F. Packer]] <small>(D)</small>
| ((Party shading/Democratic)) |21D, 12R
| ((Party shading/Democratic)) |68D, 30R, 2I
| ((Party shading/Democratic)) |14D, 11R
|- style="height:2em"
!1859
| ((Party shading/Democratic)) |17D, 16R
| ((Party shading/Republican)) |67R, 33D
| rowspan=2 ((Party shading/Republican)) |20R, 5D
|- style="height:2em"
!1860
| rowspan=3 ((Party shading/Republican)) |[[Thomas E. Cochran]] <small>(R)</small>
| ((Party shading/Republican)) |21R, 12D
| ((Party shading/Republican)) |66R, 34D
| rowspan=4 ((Party shading/Republican)) |[[Abraham Lincoln]]/<br />[[Hannibal Hamlin]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1861
| rowspan=6 ((Party shading/Republican)) |[[Andrew Gregg Curtin]] <small>(R)</small>
| ((Party shading/Republican)) |27R, 6D
| ((Party shading/Republican)) |71R, 29D
| rowspan=2 ((Party shading/Republican)) |[[David Wilmot]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican)) |[[Edgar Cowan]] <small>(R)</small>
| ((Party shading/Republican)) |19R, 6D
|- style="height:2em"
!1862
| ((Party shading/Republican)) |23R, 10D
| ((Party shading/Democratic)) |51D, 49R
| ((Party shading/Republican)) |17R, 8D
|- style="height:2em"
!1863
| rowspan=3 ((Party shading/Democratic)) |[[Isaac Slenker]] <small>(D)</small>
| ((Party shading/Republican)) |21R, 12D
| ((Party shading/Democratic)) |55D, 45R
| rowspan=6 ((Party shading/Democratic)) |[[Charles R. Buckalew]] <small>(D)</small>
| rowspan=2 ((Party shading/Tie)) |12R, 12D
|- style="height:2em"
!1864
| ((Party shading/Republican)) |17R, 16D
| ((Party shading/Republican)) |52R, 48D
| rowspan=4 ((Party shading/National Union)) |[[Abraham Lincoln]]/<br />[[Andrew Johnson]] <small>(NU)</small> ((Aye))
|- style="height:2em"
!1865
| ((Party shading/Republican)) |20R, 13D
| ((Party shading/Republican)) |64R, 36D
| ((Party shading/Republican)) |15R, 9D
|- style="height:2em"
!1866
| rowspan=7 ((Party shading/Republican)) |[[John F. Hartranft]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |21R, 12D
| ((Party shading/Republican)) |67R, 33D
| ((Party shading/Republican)) |16R, 8D
|- style="height:2em"
!1867
| rowspan=7 ((Party shading/Republican)) |[[John W. Geary]] <small>(R)</small>
| ((Party shading/Republican)) |62R, 38D
| rowspan=7 ((Party shading/Republican)) |[[Simon Cameron]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |18R, 6D
|- style="height:2em"
!1868
| ((Party shading/Republican)) |19R, 14D
| ((Party shading/Republican)) |54R, 46D
| rowspan=4 ((Party shading/Republican)) |[[Ulysses S. Grant]]/<br />[[Schuyler Colfax]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1869
| rowspan=2 ((Party shading/Republican)) |18R, 15D
| ((Party shading/Republican)) |62R, 38D
| rowspan=5 ((Party shading/Republican)) |[[John Scott (Pennsylvania politician, born 1824)|John Scott]] <small>(R)</small>
| ((Party shading/Republican)) |16R, 8D
|- style="height:2em"
!1870
| ((Party shading/Republican)) |60R, 40D
| ((Party shading/Republican)) |18R, 6D
|- style="height:2em"
!1871
| ((Party shading/Democratic)) |17D, 16R
| ((Party shading/Republican)) |55R, 45D
| rowspan=3 ((Party shading/Republican)) |13R, 11D
|- style="height:2em"
! rowspan=2 |1872
| rowspan=2 ((Party shading/Republican)) |17R, 16D
| rowspan=2 ((Party shading/Republican)) |63R, 39D, 1I
| rowspan=2 ((Party shading/Republican)) |[[Ulysses S. Grant]]/<br />[[Henry Wilson]] <small>(R)</small> ((Aye))
|- style="height:2em"
|[[C. D. Brigham]]
|- style="height:2em"
! rowspan=2 |Year!![[List of governors of Pennsylvania|Governor]]!![[Pennsylvania Auditor General|Auditor General]]!![[Pennsylvania State Senate|State Senate]]!![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator (Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan=2 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Pennsylvania|United States Congress]]
|}

=== 1873–1978 ===
{| class="wikitable" style="text-align:center"
! rowspan=2 |Year!! colspan=4 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |United States Congress!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[List of governors of Pennsylvania|Governor]]!![[Lieutenant Governor of Pennsylvania|Lieutenant<br />Governor]]!![[Pennsylvania Auditor General|Auditor<br />General]]!![[Pennsylvania Treasurer|Treasurer]]!![[Pennsylvania State Senate|State Senate]]
![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]
|- style="height:2em"
!1873
| rowspan=6 ((Party shading/Republican)) |[[John F. Hartranft]] <small>(R)</small>
| rowspan=2 |''no such office''
| rowspan=2 ((Party shading/Republican))|[[Harrison Allen (politician)|Harrison Allen]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican))|[[Robert W. Mackey]] <small>(R)</small>
| ((Party shading/Republican)) |18R, 14D, 1LR
| ((Party shading/Republican)) |60R, 39D, 1I
| rowspan=2 ((Party shading/Republican))|[[John Scott (Pennsylvania politician, born 1824)|John Scott]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican))|[[Simon Cameron]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |22R, 5D
| rowspan=3 |
|- style="height:2em"
!1874
| ((Party shading/Republican)) |20R, 12D, 1LR
| ((Party shading/Republican)) |57R, 43D
|- style="height:2em"
!1875
| rowspan=4 ((Party shading/Democratic)) |[[John Latta (politician)|John Latta]] <small>(D)</small>
| rowspan=3 ((Party shading/Democratic)) |[[Justus F. Temple]] <small>(D)</small>
| ((Party shading/Republican)) |30R, 20D((efn|Effective with the Constitution of 1874, Senators began to serve four-year terms, after a transition period starting with the election of 1874 and continuing through the election of 1876.))
| rowspan=2 ((Party shading/Democratic)) |110D, 89R, 1I, 1Proh((efn|Effective with the Constitution of 1874, House members began to serve two-year terms starting with the election of 1874.))
| rowspan=6 ((Party shading/Democratic)) |[[William A. Wallace]] <small>(D)</small>
| ((Party shading/Democratic)) |17D, 10R
|- style="height:2em"
!1876
| rowspan=2 ((Party shading/Republican)) |[[Henry Rawle]] <small>(R)</small>
| ((Party shading/Republican)) |29R, 21D
| ((Party shading/Democratic)) |18D, 9R
| rowspan=4 ((Party shading/Republican)) |[[Rutherford B. Hayes]]/<br />[[William A. Wheeler]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1877
| rowspan=2 ((Party shading/Republican)) |31R, 19D
| rowspan=2 ((Party shading/Republican)) |119R, 81D, 1ID
| rowspan=21 ((Party shading/Republican)) |[[J. Donald Cameron]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |17R, 10D
|- style="height:2em"
!1878
| rowspan=3 ((Party shading/Democratic)) |[[William P. Schell]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |[[Amos C. Noyes]] <small>(D)</small>
|- style="height:2em"
!1879
| rowspan=4 ((Party shading/Republican)) |[[Henry M. Hoyt]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Charles Warren Stone]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |32R, 17D, 1GB
| rowspan=2 ((Party shading/Republican)) |107R, 77D, 17GB
| rowspan=2 ((Party shading/Republican)) |17R, 8D, 2GB
|- style="height:2em"
!1880
| rowspan=2 ((Party shading/Republican))|[[Samuel Butler (politician)|Samuel Butler]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[James A. Garfield]]/<br />[[Chester A. Arthur]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1881
| rowspan=3 ((Party shading/Republican)) |[[John A. Lemon]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |121R, 78D, 1GB, ((nowrap|1Fus-D))
| rowspan=6 ((Party shading/Republican)) |[[John I. Mitchell]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |18R, 7D, 2GB
|- style="height:2em"
!1882
| rowspan=2 ((Party shading/Republican))|[[Silas M. Bailey]] <small>(R)</small>
|- style="height:2em"
!1883
| rowspan=4 ((Party shading/Democratic)) |[[Robert E. Pattison]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Chauncey Forward Black]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |30R, 20D
| rowspan=2 ((Party shading/Democratic)) |113D, 88R
| rowspan=2 ((Party shading/Republican)) |15R, 12D, 1GB
|- style="height:2em"
!1884
| rowspan=3 ((Party shading/Republican)) |[[Jerome B. Niles]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican))|[[William Livsey (Pennsylvania)|William Livsey]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[James G. Blaine]]/<br />[[John A. Logan]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1885
| rowspan=2 ((Party shading/Republican)) |31R, 19D
| rowspan=2 ((Party shading/Republican)) |140R, 60D, 1GBR
| rowspan=5 ((Party shading/Republican)) |20R, 8D
|- style="height:2em"
!1886
| ((Party shading/Republican)) |[[Matthew Quay]] <small>(R)</small>
|- style="height:2em"
!1887
| rowspan=5 ((Party shading/Republican)) |[[James A. Beaver]] <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |[[William T. Davies]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |[[A. Wilson Norris]]((efn|name=died|Died in office.))
|((Party shading/Republican))|William Livsey <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |34R, 16D
| rowspan=3 ((Party shading/Republican)) |131R, 69D, 1GBL
| rowspan=13 ((Party shading/Republican)) |[[Matthew Quay]] <small>(R)</small>
|- style="height:2em"
! rowspan=2 |1888
| rowspan=2 ((Party shading/Republican))|[[William B. Hart]] <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |[[Benjamin Harrison]]/<br />[[Levi P. Morton]] <small>(R)</small> ((Aye))
|- style="height:2em"
| rowspan=4 ((Party shading/Republican)) |[[Thomas McCamant]] <small>(R)</small>
|- style="height:2em"
!1889
|((Party shading/Republican))|William Livsey <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |144R, 60D
| rowspan=2 ((Party shading/Republican)) |21 R, 7D
|- style="height:2em"
!1890
| rowspan=2 ((Party shading/Republican))|[[Henry K. Boyer]] <small>(R)</small>
|- style="height:2em"
!1891
| rowspan=4 ((Party shading/Democratic)) |[[Robert E. Pattison]] <small>(D)</small>
| rowspan=4 ((Party shading/Republican)) |[[Louis Arthur Watres]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |31R, 19D
| rowspan=2 ((Party shading/Republican)) |122R, 79D, 3Fus
| ((Party shading/Republican)) |18R, 10D
|- style="height:2em"
!1892
| rowspan=3 ((Party shading/Republican)) |[[David McMurtrie Gregg]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican))|[[John Wallace Morrison]] <small>(R)</small>
| ((Party shading/Republican)) |17R, 11D
| rowspan=4 ((Party shading/Republican)) |[[Benjamin Harrison]]/<br />[[Whitelaw Reid]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1893
| rowspan=2 ((Party shading/Republican)) |33R, 17D
| rowspan=2 ((Party shading/Republican)) |135R, 69D
| rowspan=2 ((Party shading/Republican)) |20R, 10D
|- style="height:2em"
!1894
| rowspan=2 ((Party shading/Republican))|[[Samuel McCartney Jackson|Samuel Jackson]] <small>(R)</small>
|- style="height:2em"
!1895
| rowspan=4 ((Party shading/Republican)) |[[Daniel H. Hastings]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Walter Lyon (politician)|Walter Lyon]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |[[Amos H. Mylin]]
| rowspan=4 ((Party shading/Republican)) |44R, 6D
| rowspan=2 ((Party shading/Republican)) |175R, 29D
| rowspan=2 ((Party shading/Republican)) |28R, 2D
|- style="height:2em"
!1896
| rowspan=2 ((Party shading/Republican))|[[Benjamin J. Haywood]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[William McKinley]]/<br />[[Garret Hobart]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1897
| rowspan=2 ((Party shading/Republican)) |172R, 32D
| rowspan=27 ((Party shading/Republican)) |[[Boies Penrose]] <small>(R)</small>((efn|name=died))
| rowspan=2 ((Party shading/Republican)) |27R, 3D
|- style="height:2em"
!1898
| rowspan=3 ((Party shading/Republican)) |[[Levi G. McCauley]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |[[James S. Beacom]] <small>(R)</small>
|- style="height:2em"
!1899
| rowspan=4 ((Party shading/Republican)) |[[William A. Stone]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[John P. S. Gobin]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |37R, 13D
| rowspan=2 ((Party shading/Republican)) |127R, 71D, 6Fus
| rowspan=2 |''vacant''
| rowspan=2 ((Party shading/Republican)) |20R, 10D
|- style="height:2em"
!1900
| rowspan=2 ((Party shading/Republican)) |[[James E. Barnett]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[William McKinley]]/<br />[[Theodore Roosevelt]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1901
| rowspan=3 ((Party shading/Republican)) |[[Edmund B. Hardenbergh]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |38R, 12D
| rowspan=2 ((Party shading/Republican)) |156R, 48D
| rowspan=4 ((Party shading/Republican)) |[[Matthew Quay]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |26R, 4D
|- style="height:2em"
!1902
| rowspan=2 ((Party shading/Republican)) |[[Frank G. Harris]] <small>(R)</small>
|- style="height:2em"
!1903
| rowspan=5 ((Party shading/Republican)) |[[Samuel W. Pennypacker]] <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |[[William M. Brown (Pennsylvania politician)|William M. Brown]] <small>(R)</small>
| rowspan=7 ((Party shading/Republican)) |40R, 10D
| rowspan=3 ((Party shading/Republican)) |160R, 44D
| ((Party shading/Republican)) |28R, 4D
|- style="height:2em"
! rowspan=2 |1904
| rowspan=4 ((Party shading/Republican)) |[[William Preston Snyder]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |[[William L. Mathues]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |29R, 3D
| rowspan=5 ((Party shading/Republican)) |[[Theodore Roosevelt]]/<br />[[Charles W. Fairbanks]] <small>(R)</small> ((Aye))
|- style="height:2em"
| rowspan=5 ((Party shading/Republican)) |[[Philander C. Knox]] <small>(R)</small>
|- style="height:2em"
!1905
| rowspan=2 ((Party shading/Republican)) |187R, 17D
| rowspan=2 ((Party shading/Republican)) |31R, 1D
|- style="height:2em"
!1906
| rowspan=2 ((Party shading/Democratic)) |[[William H. Berry]] <small>(D)</small>
|- style="height:2em"
!1907
| rowspan=4 ((Party shading/Republican)) |[[Edwin Sydney Stuart]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Robert S. Murphy]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |[[Robert K. Young]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |157R, 50D
| rowspan=2 ((Party shading/Republican)) |25R, 7D
|- style="height:2em"
!1908
| rowspan=3 ((Party shading/Republican)) |[[John O. Sheatz]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[William Howard Taft]]/<br />[[James S. Sherman]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1909
| rowspan=2 ((Party shading/Republican)) |39R, 11D
| rowspan=2 ((Party shading/Republican)) |173R, 34D
| rowspan=8 ((Party shading/Republican)) |[[George T. Oliver]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 5D
|- style="height:2em"
!1910
| rowspan=3 ((Party shading/Republican)) |[[A.E. Sisson]] <small>(R)</small>
|- style="height:2em"
!1911
| rowspan=4 ((Party shading/Republican)) |[[John K. Tener]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[John Merriman Reynolds]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |[[Charles Frederick Wright]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |38R, 18D
| rowspan=2 ((Party shading/Republican)) |162R, 44D, 1Soc
| ((Party shading/Republican)) |23R, 9D
|- style="height:2em"
!1912
| ((Party shading/Republican)) |24R, 8D
| rowspan=4 ((Party shading/Bull Moose)) |[[Theodore Roosevelt]]/<br />[[Hiram Johnson]] <small>(Prog)</small> ((Nay))
|- style="height:2em"
!1913
| rowspan=4 ((Party shading/Republican)) |[[Archibald W. Powell]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |Robert K. Young <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |34R, 13D, 3Prog
| rowspan=2 ((Party shading/Republican)) |127R, 57D, 14Prog, 9Wash
| rowspan=2 ((Party shading/Republican)) |22R, 12D, 2Prog
|- style="height:2em"
!1914
|- style="height:2em"
!1915
| rowspan=4 ((Party shading/Republican)) |[[Martin Grove Brumbaugh]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Frank B. McClain]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |38R, 11D, 1Prog
| rowspan=2 ((Party shading/Republican)) |164R, 41D, 1Soc, 1Prog
| rowspan=2 ((Party shading/Republican)) |30R, 6D
|- style="height:2em"
!1916
| rowspan=4 ((Party shading/Republican)) |[[Charles Evans Hughes]]/<br />[[Charles W. Fairbanks]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1917
| rowspan=4 ((Party shading/Republican)) |[[Charles A. Snyder]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Harmon M. Kephart]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |39R, 10D, 1Prog
| rowspan=2 ((Party shading/Republican)) |169R, 37D, 1Soc, 1Prog
| rowspan=5 ((Party shading/Republican)) |[[Philander C. Knox]] <small>(R)</small>
| ((Party shading/Republican)) |29R, 6D, 1Prog
|- style="height:2em"
!1918
| ((Party shading/Republican)) |28R, 7D, 1Prog
|- style="height:2em"
!1919
| rowspan=6 ((Party shading/Republican)) |[[William Cameron Sproul]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican)) |[[Edward E. Beidleman]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |44R, 6D
| rowspan=2 ((Party shading/Republican)) |184R, 23D
| ((Party shading/Republican)) |29R, 7D
|- style="height:2em"
!1920
| ((Party shading/Republican)) |30R, 6D
| rowspan=6 ((Party shading/Republican)) |[[Warren G. Harding]]/<br />[[Calvin Coolidge]] <small>(R)</small> ((Aye))
|- style="height:2em"
! rowspan=2 |1921
| rowspan=6 ((Party shading/Republican)) |[[Samuel S. Lewis]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican)) |[[Charles A. Snyder]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |47R, 3D
| rowspan=4 ((Party shading/Republican)) |193R, 14D
| rowspan=4 ((Party shading/Republican)) |35R, 1D
|- style="height:2em"
| rowspan=2 ((Party shading/Republican)) |[[William E. Crow]] <small>(R)</small>
|- style="height:2em"
! rowspan=2 |1922
| rowspan=6 ((Party shading/Republican)) |[[George W. Pepper]] <small>(R)</small>
|- style="height:2em"
| rowspan=13 ((Party shading/Republican)) |[[David A. Reed]] <small>(R)</small>
|- style="height:2em"
!1923
| rowspan=4 ((Party shading/Republican)) |[[Gifford Pinchot]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[David J. Davis]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |43R, 7D
| rowspan=2 ((Party shading/Republican)) |167R, 41D
| rowspan=2 ((Party shading/Republican)) |30R, 6D
|- style="height:2em"
!1924
| rowspan=4 ((Party shading/Republican)) |[[Calvin Coolidge]]/<br />[[Charles G. Dawes]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1925
| rowspan=4 ((Party shading/Republican)) |[[Edward Martin (Pennsylvania politician)|Edward Martin]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Samuel S. Lewis]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |42R, 8D
| rowspan=2 ((Party shading/Republican)) |194R, 14D
| rowspan=2 ((Party shading/Republican)) |36R
|- style="height:2em"
!1926
|- style="height:2em"
!1927
| rowspan=4 ((Party shading/Republican)) |[[John Stuchell Fisher]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Arthur James (politician)|Arthur James]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |45R, 5D
| rowspan=2 ((Party shading/Republican)) |191R, 17D
| rowspan=3 ((Party shading/Republican)) |[[William Scott Vare]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |34R, 2D
|- style="height:2em"
!1928
| rowspan=4 ((Party shading/Republican)) |[[Herbert Hoover]]/<br />[[Charles Curtis]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1929
| rowspan=4 ((Party shading/Republican)) |[[Charles A. Waters]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Edward Martin (Pennsylvania politician)|Edward Martin]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |44R, 6D
| rowspan=2 ((Party shading/Republican)) |192R, 16D
| ((Party shading/Republican)) |35R, 1D
|- style="height:2em"
!1930
| ((Party shading/Republican)) |[[Joseph R. Grundy]] <small>(R)</small>
| ((Party shading/Republican)) |36R
|- style="height:2em"
!1931
| rowspan=4 ((Party shading/Republican)) |[[Gifford Pinchot]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Edward C. Shannon]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |46R, 4D
| rowspan=2 ((Party shading/Republican)) |184R, 22D, 2Soc
| rowspan=14 ((Party shading/Republican)) |[[James J. Davis]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |33R, 3D
|- style="height:2em"
!1932
| rowspan=4 ((Party shading/Republican)) |[[Herbert Hoover]]/<br />[[Charles Curtis]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1933
| rowspan=4 ((Party shading/Republican)) |[[Frank E. Baldwin]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Charles A. Waters]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |43R, 7D
| rowspan=2 ((Party shading/Republican)) |140R, 65D, 2I, 1Soc
| ((Party shading/Republican)) |23R, 11D
|- style="height:2em"
!1934
| ((Party shading/Republican)) |22R, 12D
|- style="height:2em"
!1935
| rowspan=4 ((Party shading/Democratic)) |[[George Howard Earle III]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Thomas Kennedy (unionist)|Thomas Kennedy]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |31R, 19D
| rowspan=2 ((Party shading/Democratic)) |117D, 89R, 2Soc
| rowspan=13 ((Party shading/Democratic)) |[[Joseph F. Guffey]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |23D, 11R
|- style="height:2em"
!1936
| rowspan=4 ((Party shading/Democratic)) |[[Franklin D. Roosevelt]]/<br />[[John Nance Garner]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1937
| rowspan=4 ((Party shading/Democratic)) |[[Warren R. Roberts]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[F. Clair Ross]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |34D, 16R
| rowspan=2 ((Party shading/Democratic)) |154D, 54R
| rowspan=2 ((Party shading/Democratic)) |27D, 7R
|- style="height:2em"
!1938
|- style="height:2em"
!1939
| rowspan=4 ((Party shading/Republican)) |[[Arthur James (politician)|Arthur James]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Samuel S. Lewis]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Republican)) |129R, 79D
| rowspan=2 ((Party shading/Republican)) |19R, 15D
|- style="height:2em"
!1940
| rowspan=4 ((Party shading/Democratic)) |[[Franklin D. Roosevelt]]/<br />[[Henry A. Wallace]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1941
| rowspan=4 ((Party shading/Democratic)) |[[F. Clair Ross]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[G. Harold Wagner]] <small>(D)</small>
| rowspan=7 ((Party shading/Republican)) |32R, 18D
| rowspan=2 ((Party shading/Democratic)) |126D, 82R
| rowspan=2 ((Party shading/Democratic)) |19D, 15R
|- style="height:2em"
!1942
|- style="height:2em"
!1943
| rowspan=5 ((Party shading/Republican)) |[[Edward Martin (Pennsylvania politician)|Edward Martin]] <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |[[John C. Bell Jr.]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |132R, 76D
| ((Party shading/Republican)) |20R, 13D
|- style="height:2em"
!1944
| ((Party shading/Republican)) |21R, 12D
| rowspan=6 ((Party shading/Democratic)) |[[Franklin D. Roosevelt]]/<br />[[Harry S. Truman]] ((Aye))
|- style="height:2em"
! rowspan=2 |1945
|((Party shading/Democratic))|[[Ted A. Rosenberg]]
| rowspan=6 ((Party shading/Democratic)) |[[Ramsey S. Black]] <small>(D)</small>
| rowspan=3 ((Party shading/Republican)) |109R, 99D
| rowspan=8 ((Party shading/Democratic)) |[[Francis J. Myers]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |18R, 15D
|- style="height:2em"
| rowspan=5 ((Party shading/Democratic)) |[[G. Harold Wagner]] <small>(D)</small>
|- style="height:2em"
!1946
| ((Party shading/Republican)) |19R, 14D
|- style="height:2em"
! rowspan=2 |1947
| ((Party shading/Republican)) |[[John C. Bell Jr.]] <small>(R)</small>
|''vacant''
| rowspan=3 ((Party shading/Republican)) |34R, 16D
| rowspan=3 ((Party shading/Republican)) |170R, 38D
| rowspan=13 ((Party shading/Republican)) |[[Edward Martin (Pennsylvania politician)|Edward Martin]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |28R, 5D
|- style="height:2em"
| rowspan=4 ((Party shading/Republican)) |[[James H. Duff]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Daniel Strickler]] <small>(R)</small>
|- style="height:2em"
!1948
| rowspan=4 ((Party shading/Republican)) |[[Thomas E. Dewey]]/<br />[[Earl Warren]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1949
| rowspan=4 ((Party shading/Republican)) |[[Weldon Brinton Heyburn (Pennsylvania politician)|Weldon Brinton Heyburn]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Charles R. Barber]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |35R, 15D
| rowspan=2 ((Party shading/Republican)) |117R, 91D
| rowspan=2 ((Party shading/Republican)) |17R, 16D
|- style="height:2em"
!1950
|- style="height:2em"
!1951
| rowspan=4 ((Party shading/Republican)) |[[John S. Fine]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Lloyd H. Wood]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |30R, 20D
| rowspan=2 ((Party shading/Republican)) |120R, 88D
| rowspan=6 ((Party shading/Republican)) |[[James H. Duff]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |20R, 13D
|- style="height:2em"
!1952
| rowspan=8 ((Party shading/Republican)) |[[Dwight D. Eisenhower]]/<br />[[Richard Nixon]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1953
| rowspan=4 ((Party shading/Republican)) |[[Charles R. Barber]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Weldon Brinton Heyburn (Pennsylvania politician)|Weldon Brinton Heyburn]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |32R, 18D
| rowspan=2 ((Party shading/Republican)) |110R, 98D
| rowspan=2 ((Party shading/Republican)) |19R, 11D
|- style="height:2em"
!1954
|- style="height:2em"
!1955
| rowspan=4 ((Party shading/Democratic)) |[[George M. Leader]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Roy E. Furman]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |26R, 24D
| rowspan=2 ((Party shading/Democratic)) |112D, 98R
| rowspan=2 ((Party shading/Republican)) |16R, 14D
|- style="height:2em"
!1956
|- style="height:2em"
!1957
| rowspan=4 ((Party shading/Republican)) |[[Charles C. Smith (Pennsylvania politician)|Charles C. Smith]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Robert F. Kent]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Republican)) |126R, 84D
| rowspan=12 ((Party shading/Democratic)) |[[Joseph S. Clark Jr.]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |17R, 13D
|- style="height:2em"
!1958
|- style="height:2em"
!1959
| rowspan=4 ((Party shading/Democratic)) |[[David L. Lawrence]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[John Morgan Davis]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |28R, 22D
| rowspan=2 ((Party shading/Democratic)) |108D, 102R
| rowspan=18 ((Party shading/Republican)) |[[Hugh Scott]] <small>(R)</small>
| rowspan=2 ((Party shading/Democratic)) |16D, 14R
|- style="height:2em"
!1960
| rowspan=4 ((Party shading/Democratic)) |[[John F. Kennedy]]/<br />[[Lyndon B. Johnson]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1961
| rowspan=4 ((Party shading/Democratic)) |[[Thomas Z. Minehart]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Grace M. Sloan]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |25D, 25R((efn|Due to the Democratic Lt. Governor casting the deciding vote, the Democrats took control of the chamber.))
| rowspan=2 ((Party shading/Democratic)) |109D, 101R
| rowspan=2 ((Party shading/Republican)) |16R, 14D
|- style="height:2em"
!1962
|- style="height:2em"
!1963
| rowspan=4 ((Party shading/Republican)) |[[William Scranton]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Raymond P. Shafer]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Republican)) |108R, 102D
| rowspan=2 ((Party shading/Republican)) |14R, 13D
|- style="height:2em"
!1964
| rowspan=4 ((Party shading/Democratic)) |[[Lyndon B. Johnson]]/<br />[[Hubert Humphrey]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1965
| rowspan=4 ((Party shading/Democratic)) |[[Grace M. Sloan]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Thomas Z. Minehart]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |28R, 22D
| rowspan=2 ((Party shading/Democratic)) |116D, 93R
| rowspan=2 ((Party shading/Democratic)) |15D, 12R
|- style="height:2em"
!1966
|- style="height:2em"
!1967
| rowspan=4 ((Party shading/Republican)) |[[Raymond P. Shafer]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Raymond J. Broderick]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Republican)) |104R, 99D
| rowspan=6 ((Party shading/Democratic)) |14D, 13R
|- style="height:2em"
!1968
| rowspan=4 ((Party shading/Democratic)) |[[Hubert Humphrey]]/<br />[[Edmund Muskie]] <small>(D)</small> ((Nay))
|- style="height:2em"
!1969
| rowspan=8 ((Party shading/Democratic)) |[[Bob Casey Sr.]] <small>(D)</small>
| rowspan=8 ((Party shading/Democratic)) |[[Grace M. Sloan]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |107D, 96R
| rowspan=10 ((Party shading/Republican)) |[[Richard Schweiker]] <small>(R)</small>
|- style="height:2em"
!1970
|- style="height:2em"
!1971
| rowspan=8 ((Party shading/Democratic)) |[[Milton Shapp]] <small>(D)</small>
| rowspan=8 ((Party shading/Democratic)) |[[Ernest Kline]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |26D, 24R
| rowspan=2 ((Party shading/Democratic)) |113D, 90R
|- style="height:2em"
!1972
| rowspan=4 ((Party shading/Republican)) |[[Richard Nixon]]/<br />[[Spiro Agnew]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1973
| rowspan=2 ((Party shading/Republican)) |107R, 96D
| rowspan=2 ((Party shading/Democratic)) |13D, 12R
|- style="height:2em"
!1974
|- style="height:2em"
!1975
| rowspan=2 ((Party shading/Democratic)) |30D, 20R
| rowspan=2 ((Party shading/Democratic)) |113D, 90R
| rowspan=2 ((Party shading/Democratic)) |14D, 11R
|- style="height:2em"
!1976
| rowspan=3 ((Party shading/Democratic)) |[[Jimmy Carter]]/<br />[[Walter Mondale]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1977
| rowspan=2 ((Party shading/Democratic)) |[[Al Benedict]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |[[Robert E. Casey]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |31D, 19R
| rowspan=2 ((Party shading/Democratic)) |118D, 85R
| rowspan=2 ((Party shading/Republican)) |[[John Heinz]] <small>(R)</small>
| rowspan=2 ((Party shading/Democratic)) |17D, 8R
|- style="height:2em"
!1978
|- style="height:2em"
! rowspan=2 |Year!![[List of governors of Pennsylvania|Governor]]!![[Lieutenant Governor of Pennsylvania|Lieutenant<br />Governor]]!![[Pennsylvania Auditor General|Auditor<br />General]]!![[Pennsylvania Treasurer|Treasurer]]!![[Pennsylvania State Senate|State Senate]]!![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan=4 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Pennsylvania|United States Congress]]
|}

=== 1978–present ===
{| class="wikitable" style="text-align:center"
! rowspan=2 |Year!! colspan=5 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |United States Congress!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[List of governors of Pennsylvania|Governor]]!![[Lieutenant Governor of Pennsylvania|Lieutenant<br />Governor]]!![[Pennsylvania Attorney General|Attorney<br />General]]!![[Pennsylvania Auditor General|Auditor<br />General]]!![[Pennsylvania Treasurer|Treasurer]]!![[Pennsylvania State Senate|State Senate]]
![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]
|- style="height:2em"
!1979
| rowspan=8 ((Party shading/Republican)) |[[Dick Thornburgh]] <small>(R)</small>
| rowspan=8 ((Party shading/Republican)) |[[William Scranton III]] <small>(R)</small>
| rowspan=2 |''not an elected office''
| rowspan=6 ((Party shading/Democratic))|[[Al Benedict]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic))|[[Robert E. Casey]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |28D, 22R
| rowspan=2 ((Party shading/Republican)) |102R, 101D
| rowspan=13 ((Party shading/Republican))|[[John Heinz]] <small>(R)</small>((efn|name=died))
| rowspan=2 ((Party shading/Republican))|[[Richard Schweiker]] <small>(R)</small>
| rowspan=2 ((Party shading/Democratic)) |15D, 10R
|
|- style="height:2em"
!1980
| rowspan=8 ((Party shading/Republican)) |[[Ronald Reagan]]/<br />[[George H. W. Bush]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1981
| rowspan=8 ((Party shading/Republican)) |[[LeRoy Zimmerman]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican)) |[[R. Budd Dwyer]] <small>(R)</small>((efn|name=died))
| rowspan=2 ((Party shading/Republican)) |26R, 24D
| rowspan=2 ((Party shading/Republican)) |103R, 100D
| rowspan=34 ((Party shading/Republican)) |[[Arlen Specter]] <small>(R)</small>
| rowspan=2 ((Party shading/Democratic)) |13D, 12R
|- style="height:2em"
!1982
|- style="height:2em"
!1983
| rowspan=4 ((Party shading/Republican)) |27R, 23D
| rowspan=4 ((Party shading/Democratic)) |103D, 100R
| rowspan=4 ((Party shading/Democratic)) |13D, 10R
|- style="height:2em"
!1984
|- style="height:2em"
!1985
| rowspan=4 ((Party shading/Democratic)) |[[Donald A. Bailey]] <small>(D)</small>
|- style="height:2em"
!1986
|- style="height:2em"
!1987
| rowspan=9 ((Party shading/Democratic)) |[[Bob Casey Sr.]] <small>(D)</small>
| rowspan=9 ((Party shading/Democratic)) |[[Mark Singel]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |[[G. Davis Greene Jr.]] <small>(D)</small>((efn|name=app|Appointed to fill a vacancy.))
| rowspan=2 ((Party shading/Republican)) |26R, 24D
| rowspan=2 ((Party shading/Democratic)) |102D, 101R
| rowspan=4 ((Party shading/Democratic)) |12D, 11R
|- style="height:2em"
!1988
| rowspan=5 ((Party shading/Republican)) |[[George H. W. Bush]]/<br />[[Dan Quayle]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1989
| rowspan=8 ((Party shading/Republican)) |[[Ernie Preate]] <small>(R)</small>((efn|name=resigned|Resigned.))
| rowspan=10 ((Party shading/Republican)) |[[Barbara Hafer]] <small>(R)</small>
| rowspan=10 ((Party shading/Democratic)) |[[Catherine Baker Knoll]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Democratic)) |104D, 99R
|- style="height:2em"
!1990
|- style="height:2em"
! rowspan=2 |1991
| rowspan=3 ((Party shading/Republican)) |26R, 24D
| rowspan=3 ((Party shading/Democratic)) |107D, 96R
| rowspan=3 ((Party shading/Republican)) |12R, 11D
|- style="height:2em"
| rowspan=4 ((Party shading/Democratic)) |[[Harris Wofford]] <small>(D)</small>((efn|Appointed by Governor Casey in May 1991 after Heinz's death and won a special election in November 1991 for the remainder of the term.))
|- style="height:2em"
!1992
| rowspan=9 ((Party shading/Democratic)) |[[Bill Clinton]]/<br />[[Al Gore]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1993
| ((Party shading/Democratic)) |25D, 25R((efn|Sen. [[Frank Pecora]] switched parties from Republican to Democratic, but in the case of ties, the Lt. Governor casts the deciding vote, and as a Democrat, he gave his party control.<ref>((cite web |url=http://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5341&body=S |title=Frank A Pecora |publisher=Pennsylvania General Assembly |access-date=January 3, 2017 ))</ref>))
| rowspan=2 ((Party shading/Democratic)) |105D, 98R
| rowspan=9 ((Party shading/Democratic)) |11D, 10R
|- style="height:2em"
!1994
| ((Party shading/Republican)) |26R, 24D((efn|After months of turmoil, a special election result was thrown out that had been won by Democrat [[William G. Stinson]], who had succeeded fellow Democrat [[Francis Lynch]]. A federal judge awarded the election to Republican [[Bruce Marks]].  Additionally, Democrat [[Eugene Scanlon]]'s death in March 1994 gave Republicans control.<ref>((cite news|title=Pa. Sen. Scanlon Dies, Leaving Senate in Grief, GOP in Lead Regardless of the Stinson Outcome, the Republicans Are Now the Majority and Can Control the Action|date=March 11, 1994|page=B06|first=Russell E.|last=Eshleman Jr.|url=http://articles.philly.com/1994-03-11/news/25848967_1_republican-bruce-marks-popular-democratic-senator-senate-session |archive-url=https://web.archive.org/web/20160103151301/http://articles.philly.com/1994-03-11/news/25848967_1_republican-bruce-marks-popular-democratic-senator-senate-session|url-status=dead|archive-date=January 3, 2016|newspaper=Philadelphia Inquirer))</ref>))
|- style="height:2em"
! rowspan=2 |1995
| rowspan=8 ((Party shading/Republican)) |[[Tom Ridge]] <small>(R)</small>
| rowspan=8 ((Party shading/Republican)) |[[Mark Schweiker]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |29R, 21D
| rowspan=3 ((Party shading/Republican)) |102R, 101D
| rowspan=15 ((Party shading/Republican)) |[[Rick Santorum]] <small>(R)</small>
|- style="height:2em"
| rowspan=2 ((Party shading/Republican)) |[[Tom Corbett]] <small>(R)</small>((efn|name=app))
|- style="height:2em"
!1996
|- style="height:2em"
!1997
| rowspan=9 ((Party shading/Republican)) |[[D. Michael Fisher]] <small>(R)</small>((efn|name=resigned))
| rowspan=10 ((Party shading/Democratic)) |[[Bob Casey Jr.]] <small>(D)</small>
| rowspan=7 ((Party shading/Republican)) |[[Barbara Hafer]] <small>(R)</small>
| rowspan=7 ((Party shading/Republican)) |30R, 20D
| rowspan=2 ((Party shading/Republican)) |104R, 99D
|- style="height:2em"
!1998
|- style="height:2em"
!1999
| rowspan=2 ((Party shading/Republican)) |103R, 100D
|- style="height:2em"
!2000
| rowspan=5 ((Party shading/Democratic)) |[[Al Gore]]/<br />[[Joe Lieberman]] <small>(D)</small> ((Nay))
|- style="height:2em"
! rowspan=2 |2001
| rowspan=3 ((Party shading/Republican)) |104R, 99D
| rowspan=3 ((Party shading/Republican)) |11R, 10D
|- style="height:2em"
| rowspan=2 ((Party shading/Republican)) |[[Mark Schweiker]] <small>(R)</small>((efn|As lieutenant governor, filled vacancy in office of governor.))
| rowspan=2 ((Party shading/Republican)) |[[Robert Jubelirer]] <small>(R)</small>((efn|name=senpres|As [[president pro tempore]] of the state Senate, filled vacancy in office of lieutenant governor.))
|- style="height:2em"
!2002
|- style="height:2em"
!2003
| rowspan=11 ((Party shading/Democratic)) |[[Ed Rendell]] <small>(D)</small>
| rowspan=7 ((Party shading/Democratic)) |[[Catherine Baker Knoll]] <small>(D)</small>((efn|name=died))
| rowspan=3 ((Party shading/Democratic)) |[[Barbara Hafer]] <small>(D)</small>
| rowspan=3 ((Party shading/Republican)) |29R, 21D
| rowspan=3 ((Party shading/Republican)) |110R, 93D
| rowspan=5 ((Party shading/Republican)) |12R, 7D
|- style="height:2em"
! rowspan=2 |2004
| rowspan=5 ((Party shading/Democratic)) |[[John Kerry]]/<br />[[John Edwards]] <small>(D)</small> ((Nay))
|- style="height:2em"
| ((Party shading/Republican)) |[[Jerry Pappert]] <small>(R)</small>((efn|name=app))
|- style="height:2em"
!2005
| rowspan=8 ((Party shading/Republican)) |[[Tom Corbett]] <small>(R)</small>
| rowspan=10 ((Party shading/Democratic)) |[[Jack Wagner (politician)|Jack Wagner]] <small>(D)</small>
| rowspan=2 ((Party shading/Democratic)) |[[Bob Casey Jr.]] <small>(D)</small>((efn|name=ressen|Resigned following election to U.S. Senate.))
| rowspan=2 ((Party shading/Republican)) |30R, 20D
| rowspan=2 ((Party shading/Republican)) |110R, 93D
|- style="height:2em"
!2006
|- style="height:2em"
!2007
| rowspan=3 ((Party shading/Democratic)) |[[Robin Wiessmann]] <small>(D)</small>((efn|name=app))
| rowspan=3 ((Party shading/Republican)) |29R, 21D
| rowspan=3 ((Party shading/Democratic)) |102D, 101R((efn|Elected a Republican Speaker.))
| rowspan=20 ((Party shading/Democratic/active)) |[[Bob Casey Jr.]] <small>(D)</small>
| rowspan=3 ((Party shading/Democratic)) |11D, 8R
|- style="height:2em"
! rowspan=2 |2008
| rowspan=10 ((Party shading/Democratic)) |[[Barack Obama]]/<br />[[Joe Biden]] <small>(D)</small> ((Aye))
|- style="height:2em"
| rowspan=4 ((Party shading/Republican)) |[[Joe Scarnati]] <small>(R)</small>((efn|name=senpres))
|- style="height:2em"
! rowspan=2 |2009
| rowspan=7 ((Party shading/Democratic)) |[[Rob McCord]] <small>(D)</small>((efn|name=resigned))<ref>((cite news |url=http://lancasteronline.com/news/local/pennsylvania-treasurer-rob-mccord-says-he-will-plead-guilty-to/article_3641e3a6-a8c4-11e4-b346-9f1f7587d584.html |title=Pennsylvania treasurer Rob McCord says he will plead guilty to federal charges |newspaper=Lancaster Online |date=January 31, 2015 |access-date=May 20, 2015 |first=Marc |last=Levy |agency=Associated Press ))</ref>
| rowspan=5 ((Party shading/Republican)) |30R, 20D
| rowspan=3 ((Party shading/Democratic)) |104D, 99R
| rowspan=3 ((Party shading/Democratic)) |12D, 7R
|- style="height:2em"
| rowspan=2 ((Party shading/Democratic)) |[[Arlen Specter]] <small>(D)</small><ref>[[Party switching in the United States|Switched parties]] from Republican to Democratic on April 28, 2009.</ref>
|- style="height:2em"
!2010
|- style="height:2em"
!2011
| rowspan=4 ((Party shading/Republican)) |[[Tom Corbett]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Jim Cawley]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) | [[Linda L. Kelly]] <small>(R)</small>((efn|name=app))((efn|[[William H. Ryan Jr.]] served as acting Attorney General from January (when Corbett was inaugurated as governor) until Kelly's nomination was confirmed by the [[Pennsylvania Senate|State Senate]].))
| rowspan=2 ((Party shading/Republican)) |112R, 91D
| rowspan=13 ((Party shading/Republican)) |[[Pat Toomey]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |12R, 7D
|- style="height:2em"
!2012
|- style="height:2em"
!2013
| rowspan=4 ((Party shading/Democratic)) |[[Kathleen Kane]] <small>(D)</small>((efn|name=resigned))<ref>((Cite news |first1=Susannah|last1=Cullinane|first2=Ralph|last2=Ellis|date=2016-08-16|title=Pennsylvania Attorney General Kathleen Kane resigning |work=CNN Politics|url=https://www.cnn.com/2016/08/16/politics/pennsylvania-attorney-general-kane/index.html|access-date=2021-06-24 |language=en))</ref>
| rowspan=9 ((Party shading/Democratic)) |[[Eugene DePasquale]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) |27R, 23D
| rowspan=2 ((Party shading/Republican)) |111R, 92D
| rowspan=6 ((Party shading/Republican)) |13R, 5D
|- style="height:2em"
!2014
|- style="height:2em"
!2015
| rowspan=9 ((Party shading/Democratic)) |[[Tom Wolf]] <small>(D)</small>
| rowspan=5 ((Party shading/Democratic)) |[[Mike Stack]] <small>(D)</small>
| rowspan=3 ((Party shading/Independent (United States))) |[[Tim Reese]] <small>(I)</small>((efn|name=app))
| ((Party shading/Republican)) |30R, 20D
| ((Party shading/Republican)) |120R, 83D
|- style="height:2em"
! rowspan=2 |2016
| rowspan=2 ((Party shading/Republican)) |31R, 19D
| rowspan=2 ((Party shading/Republican)) |119R, 84D
| rowspan=5 ((Party shading/Republican)) |[[Donald Trump]]/<br />[[Mike Pence]] <small>(R)</small> ((Aye))
|- style="height:2em"
| ((Party shading/Democratic)) |[[Bruce Beemer]] <small>(D)</small>((efn|name=app))((efn|Republican Deputy Attorney General [[Bruce Castor]] served for 13 days from August 17–30 between Kane's resignation and Beemer's assumption of the office.))
|- style="height:2em"
!2017
| rowspan=6 ((Party shading/Democratic)) |[[Josh Shapiro]] <small>(D)</small>
| rowspan=4 ((Party shading/Democratic)) |[[Joe Torsella]] <small>(D)</small>
| rowspan=2 ((Party shading/Republican)) and |34R, 16D
| rowspan=2 ((Party shading/Republican)) |121R, 82D
|- style="height:2em"
!2018
| ((Party shading/Republican)) |10R, 8D((efn|Democrat [[Conor Lamb]] won a [[Pennsylvania's 18th congressional district special election, 2018|special election]] to fill a vacancy for Pennsylvania's 18th Congressional District, left by Republican [[Timothy F. Murphy]]'s resignation. Democrats [[Mary Gay Scanlon]] and [[Susan Wild]] won [[2018 Pennsylvania's 7th and 15th congressional district special elections|special elections]] to fill seats left vacant by Republicans [[Pat Meehan]]/<br />[[Charlie Dent]] respectively.))
|- style="height:2em"
!2019
| rowspan=4 ((Party shading/Democratic)) |[[John Fetterman]] <small>(D)</small>
| ((Party shading/Republican)) |28R, 22D((efn|Republican [[Don C. White]] resigned in February 2019 and Republican [[Joe Pittman (politician)|Joe Pittman]] was elected in May 2019 to succeed him.((Citation needed|date=June 2021)) Also, Republican [[Mike Folmer]] resigned in September 2019 and Republican [[Dave Arnold (politician)|Dave Arnold]] was elected to succeed him in a January 2020 special election.<ref>((cite news|title=PoliticsPA|url=https://www.politicspa.com/folmer-resigns-after-being-charged-with-possession-of-child-pornography/92304/|access-date=2021-06-24))</ref><ref>((Cite news |date=2020-01-14|title=Dave Arnold wins 48th Senatorial District special election |url=https://local21news.com/news/local/dave-arnold-wins-48th-senatorial-district-special-election|access-date=2021-06-24|work=Local 21 News))</ref>))
| rowspan=2 ((Party shading/Republican)) |110R, 93D
| rowspan=4 ((Party shading/Tie))|9R, 9D
|- style="height:2em"
!2020
| ((Party shading/Republican)) |28R, 21D, 1I((efn|[[John Yudichak]] (District 14) [[Party switching in the United States|switched parties]] from Democratic to Independent in November 2019 and began caucusing with the Republican majority.<ref>((cite web|date=2019-11-19|title=Pa. Dems lose a state senator: John Yudichak of Luzerne County declares himself independent, will caucus with GOP|url=https://www.pennlive.com/news/2019/11/pa-dems-lose-a-state-senator-john-yudichak-of-luzerne-county-declares-himself-independent-will-caucus-with-gop.html|access-date=2021-06-24|website=pennlive|language=en))</ref>))
| rowspan=4 ((party shading/Democratic/active)) |[[Joe Biden]]/<br />[[Kamala Harris]] <small>(D)</small> ((Aye))
|- style="height:2em"
!2021
| rowspan=3 ((Party shading/Republican/active)) |[[Timothy DeFoor]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican/active)) |[[Stacy Garrity]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |28R, 21D, 1I
| rowspan=2 ((Party shading/Republican)) |113R, 90D
|- style="height:2em"
!2022
|- style="height:2em"
!2023
| ((Party shading/Democratic/active)) |[[Josh Shapiro]] <small>(D)</small>
| ((Party shading/Democratic/active)) |[[Austin Davis (politician)|Austin Davis]] <small>(D)</small>
| ((Party shading/Democratic/active))|[[Michelle Henry]] <small>(D)</small>((efn|name=app))
| ((Party shading/Republican/active))|28R, 22D
| ((Party shading/Democratic/active))|102D, 101R
| ((Party shading/Democratic/active)) |[[John Fetterman]] <small>(D)</small>
| ((Party shading/Democratic/active)) |9D, 8R
|- style="height:2em"
! rowspan=2 |Year!![[List of governors of Pennsylvania|Governor]]!![[Lieutenant Governor of Pennsylvania|Lieutenant<br />Governor]]!![[Pennsylvania Attorney General|Attorney<br />General]]!![[Pennsylvania Auditor General|Auditor<br />General]]!![[Pennsylvania Treasurer|Treasurer]]!![[Pennsylvania State Senate|State Senate]]!![[Pennsylvania House of Representatives|State House]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class I)]]!![[List of United States senators from Pennsylvania|U.S. Senator<br />(Class III)]]!![[List of United States representatives from Pennsylvania|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan=5 |Executive offices!! colspan=2 |[[Pennsylvania General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Pennsylvania|United States Congress]]
|}
((United States political party shading key))
((notelist))

==See also==
* [[Pennsylvania Democratic Party|Democratic Party of Pennsylvania]]
* [[Elections in Pennsylvania]]
* [[Green Party of Pennsylvania]]
* [[Libertarian Party of Pennsylvania]]
* [[Politics of Pennsylvania]]
* [[Republican State Committee of Pennsylvania|Republican Party of Pennsylvania]]

==References==
((reflist))

((Political party strength in U.S. states))

((DEFAULTSORT:Political Party Strength In Pennsylvania))
[[Category:Politics of Pennsylvania]]
[[Category:Government of Pennsylvania]]
[[Category:Political party strength in the United States by state|Pennsylvania]]

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