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((More citations needed|date=September 2020))
The following table indicates the party of elected officials in the [[U.S. state]] of [[Ohio]]:
*[[List of governors of Ohio|Governor]]
*[[List of lieutenant governors of Ohio|Lieutenant Governor]]
*[[Ohio Attorney General|Attorney General]]
*[[Ohio Secretary of State|Secretary of State]]
*[[Ohio State Treasurer|State Treasurer]]
*[[Ohio State Auditor|State Auditor]]

The table also indicates the historical party composition in the:
*[[Ohio Senate|State Senate]]
*[[Ohio House of Representatives|State House of Representatives]]
*[[Supreme Court of Ohio|State Supreme Court]]
*[[List of United States senators from Ohio|State delegation to the U.S. Senate]]
*[[List of United States representatives from Ohio|State delegation to the U.S. House of Representatives]]

For years in which a [[United States presidential election|presidential election]] was held, the table indicates which party's nominees received the state's electoral votes. Also indicated is the party that controlled the [[Ohio Apportionment Board]], which draws legislative districts for the [[Ohio General Assembly]] in the years following the [[United States census|United States Census]].

==1788–1845==
{|class=wikitable style="text-align:center"
!rowspan=2|Year!! colspan=4 |Executive offices!!colspan=2|[[Ohio General Assembly|State Legislature]]!! rowspan=2 |[[Supreme Court of Ohio|Ohio<br/>Supreme<br/>Court]]!!colspan=3|[[United States congressional delegations from Ohio|United States Congress]]!!rowspan=2|[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[List of governors of Ohio|Governor]]!![[Ohio Secretary of State|Secretary of State]]!![[Ohio State Treasurer|Treasurer]]!![[Ohio State Auditor|Auditor]]!![[Ohio Senate|State Senate]]!![[Ohio House of Representatives|State House]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class I)]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class III)]]!![[List of United States representatives from Ohio|U.S. House]]
|- style="height:2em"
!1788
|rowspan=15 ((Party shading/Federalist))|[[Arthur St. Clair]] <small>(F)</small>((efn|Governor of the [[Northwest Territory]] appointed by the [[Continental Congress]]. There was no Ohio Territory; Ohio is considered the successor state to the Northwest Territory.))
|rowspan=11 ((Party shading/Federalist))|[[Winthrop Sargent]] <small>(F)</small> 
|
|
|
|
|
|
|
|
|rowspan=16|((efn|Ohio was accepted into the Union in 1803, and cast its first votes for president in the 1804 election.))
|- style="height:2em"
!1789
|- style="height:2em"
!1790
|- style="height:2em"
!1791
|- style="height:2em"
!1792
|- style="height:2em"
!1793
|- style="height:2em"
!1794
|- style="height:2em"
!1795
|- style="height:2em"
!1796
|rowspan=7 ((Party shading/Federalist))|[[John Armstrong (frontiersman)|John Armstrong]] <small>(F)</small>
|- style="height:2em"
!1797
|- style="height:2em"
!1798
|- style="height:2em"
!1799
|((Party shading/Federalist))|[[William Henry Harrison]] <small>(F)</small>
|- style="height:2em"
!1800
|rowspan=3 ((Party shading/Democratic-Republican))|[[Charles Willing Byrd]] <small>(DR)</small>
|- style="height:2em"
!1801
|- style="height:2em"
!1802
|- style="height:2em"
!1803
|rowspan=4 ((Party shading/Democratic-Republican))|[[Edward Tiffin]] <small>(DR)</small>((efn|name=res-senate|Resigned to take an elected seat in the [[United States Senate]].))
|rowspan=5 ((Party shading/Democratic-Republican)) |[[William Creighton Jr.]] <small>(DR)</small>
|rowspan=13 ((Party shading/Democratic-Republican))|[[William McFarland (Ohio)|William McFarland]] <small>(DR)</small> 
|rowspan=5 ((Party shading/Democratic-Republican))|[[Thomas Gibson (American politician)|Thomas Gibson]] <small>(DR)</small>
| rowspan=23 ((Party shading/Democratic-Republican))|DR maj.
| rowspan=23 ((Party shading/Democratic-Republican))|DR maj.
| rowspan=5 ((Party shading/Democratic-Republican))|3DR
|rowspan=5 ((Party shading/Democratic-Republican))|[[John Smith (Ohio politician, died 1824)|John Smith]] <small>(DR)</small>
|rowspan=4 ((Party shading/Democratic-Republican))|[[Thomas Worthington (governor)|Thomas Worthington]] <small>(DR)</small>
|rowspan=10 ((Party shading/Democratic-Republican))|1DR
|- style="height:2em"
!1804
|rowspan=4 ((Party shading/Democratic-Republican))|[[Thomas Jefferson]]/<br/>[[George Clinton (vice president)|George Clinton]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1805
|- style="height:2em"
!1806
|- style="height:2em"
!1807
|((Party shading/Democratic-Republican))|[[Thomas Kirker]] <small>(DR)</small>((efn|name=speaker-acted|As speaker of the Senate, acted as governor for unexpired term.))
|rowspan=2 ((Party shading/Democratic-Republican))|[[Edward Tiffin]] <small>(DR)</small>
|- style="height:2em"
!1808
|rowspan=2 ((Party shading/Democratic-Republican))|[[Samuel Huntington (Ohio politician)|Samuel Huntington]] <small>(DR)</small>((efn|The 1808 election was actually won by [[Return J. Meigs Jr.]], but Meigs was declared ineligible for office for failing residency requirements.))
|rowspan=24 ((Party shading/Democratic-Republican))|[[Jeremiah McLene]] <small>(DR)</small>
|rowspan=7 ((Party shading/Democratic-Republican))|[[Benjamin Hough]] <small>(DR)</small>
| rowspan=3 ((Party shading/Democratic-Republican))|4DR
| ((Party shading/Democratic-Republican)) |''vacant''
| rowspan=4 ((Party shading/Democratic-Republican)) |[[James Madison]]/<br/>[[George Clinton (vice president)|George Clinton]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1809
| rowspan=2 ((Party shading/Democratic-Republican))|[[Return J. Meigs Jr.]] <small>(DR)</small>
|((Party shading/Democratic-Republican))|[[Stanley Griswold]] <small>(DR)</small>
|- style="height:2em"
!1810
|rowspan=4 ((Party shading/Democratic-Republican))|[[Return J. Meigs Jr.]] <small>(DR)</small>((efn|Resigned to become [[United States Postmaster General]].))
|rowspan=4 ((Party shading/Democratic-Republican))|[[Alexander Campbell (American politician)|Alexander Campbell]] <small>(DR)</small>
|- style="height:2em"
!1811
| rowspan=5 ((Party shading/Democratic-Republican))|3DR
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Thomas Worthington (governor)|Thomas Worthington]] <small>(DR)</small>
|- style="height:2em"
!1812
| rowspan=4 ((Party shading/Democratic-Republican)) |[[James Madison]]/<br/>[[Elbridge Gerry]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1813
|rowspan=11 ((Party shading/Democratic-Republican))|6DR
|- style="height:2em"
!1814
|((Party shading/Democratic-Republican)) |[[Othniel Looker]] <small>(DR)</small>((efn|name=speaker-acted))
|rowspan=5 ((Party shading/Democratic-Republican))|[[Jeremiah Morrow]] <small>(DR)</small>
|- style="height:2em"
!1815
| rowspan=3 ((Party shading/Democratic-Republican))|[[Thomas Worthington (governor)|Thomas Worthington]] <small>(DR)</small>
|rowspan=19 ((Party shading/Democratic-Republican))|[[Ralph Osborn]] <small>(DR)</small>
|((Party shading/Democratic-Republican))|[[Joseph Kerr]] <small>(DR)</small>
|- style="height:2em"
!1816
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Hiram M. Curry]] <small>(DR)</small>
| rowspan=10 ((Party shading/Democratic-Republican))|4DR
| rowspan=10 ((Party shading/Democratic-Republican)) |[[Benjamin Ruggles]] <small>(DR)</small>
|rowspan=9 ((Party shading/Democratic-Republican))|[[James Monroe]]/<br/>[[Daniel D. Tompkins]] <small>(DR)</small> ((Aye))
|- style="height:2em"
!1817
|- style="height:2em"
!1818
|rowspan=4 ((Party shading/Democratic-Republican))|[[Ethan Allen Brown]] <small>(DR)</small>((efn|name=res-senate))
|- style="height:2em"
!1819
|rowspan=3 ((Party shading/Democratic-Republican))|[[William A. Trimble]] <small>(DR)</small>
|- style="height:2em"
!1820
|rowspan=4 ((Party shading/Democratic-Republican))|[[Samuel Sullivan (politician)|Samuel Sullivan]] <small>(DR)</small>
|- style="height:2em"
!1821
|- style="height:2em"
!rowspan=2|1822
|((Party shading/Federalist))|[[Allen Trimble]] <small>(F)</small>((efn|name=speaker-acted))
|rowspan=4 ((Party shading/Democratic-Republican))|[[Ethan Allen Brown]] <small>(DR)</small>
|- style="height:2em"
|rowspan=4 ((Party shading/Democratic-Republican))|[[Jeremiah Morrow]] <small>(DR)</small>
|- style="height:2em"
!1823
|rowspan=12 ((Party shading/Democratic-Republican))|[[Henry Brown (Ohio politician)|Henry Brown]] <small>(DR)</small>
|rowspan=2 ((Party shading/National Republican))|10NR, 2J, 2DR
|- style="height:2em"
!1824
| rowspan=4 ((Party shading/Democratic-Republican)) |[[Henry Clay]]/<br/>[[Nathan Sanford]] <small>(DR)</small> ((Nay))
|- style="height:2em"
!1825
|((dm|?|date=July 2021))
|((dm|?|date=July 2021))
| rowspan=5 ((Party shading/National Republican))|4NR
| rowspan=8 ((Party shading/National Republican))|[[Benjamin Ruggles]] <small>(NR)</small>
|rowspan=3 ((Party shading/National Republican))|[[William Henry Harrison]] <small>(NR)</small>
|rowspan=2 ((Party shading/National Republican))|12NR, 2J
|- style="height:2em"
!1826
|rowspan=4 ((Party shading/National Republican))|[[Allen Trimble]] <small>(NR)</small>((efn|[[Allen Trimble]] ran as a Federalist in 1822 and [[National Republican Party|National Republican]] in 1826.<ref>((cite book |title=The Democratic party of the state of Ohio: a comprehensive history |volume= 1 |editor-first=Thomas Edward |editor-last=Powell |editor-link=Thomas E. Powell|publisher=The Ohio Publishing Company |year=1913 |page=67 |url=https://books.google.com/books?id=Y14PAAAAYAAJ&pg=PA67))</ref>))
|((dm|?|date=July 2021))
|((dm|?|date=July 2021))
|- style="height:2em"
!1827
|((dm|?|date=July 2021))
|((dm|?|date=July 2021))
|rowspan=2 ((Party shading/National Republican))|12NR, 2J
|- style="height:2em"
!1828
|((Party shading/National Republican))|22NR, 13J
|((Party shading/National Republican))|44NR, 28J
|rowspan=4 ((Party shading/National Republican))|[[Jacob Burnet]] <small>(NR)</small>
|rowspan=4  ((Party shading/Democratic))| [[Andrew Jackson]]/<br/>[[John C. Calhoun]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1829
|((Party shading/National Republican))|19NR, 17J
|((Party shading/National Republican))|38NR, 34J
|rowspan=2 ((Party shading/Jacksonian))|8J, 6NR
|- style="height:2em"
!1830
|rowspan=2 ((Party shading/National Republican))|[[Duncan McArthur]] <small>(NR)</small>
|((Party shading/Jacksonian))|21J, 15NR
|((Party shading/Jacksonian))|37J, 32NR, 3?
|((Party shading/Tie))|2NR, 2J
|- style="height:2em"
!1831
| rowspan=4 ((Party shading/Whig)) |[[Moses H. Kirby]] <small>(NR)</small>
|((Party shading/Democratic))|18D, 18W((efn|A Democrat, Samuel R. Miller, was elected as Speaker of the Senate.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=277))</ref>))
|((Party shading/National Republican))|38NR, 29D, ((nowrap|5((Abbr|A-C|Anti-coalition))))
| rowspan=2 ((Party shading/National Republican))|3NR, 1J
|rowspan=2 ((Party shading/National Republican))|8NR, 6J
|- style="height:2em"
!1832
|rowspan=4 ((Party shading/Democratic))|[[Robert Lucas (governor)|Robert Lucas]] <small>(D)</small>
|((Party shading/National Republican))|20NR, 16D
|((Party shading/National Republican))|42NR, 30D
|rowspan=5 ((Party shading/National Republican))|[[Thomas Ewing]] <small>(NR)</small>
|rowspan=4 ((Party shading/Democratic))|[[Andrew Jackson]]/<br/>[[Martin Van Buren]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1833
|rowspan=6 ((Party shading/Democratic))|[[John A. Bryan]] <small>(D)</small>
|((Party shading/Democratic))|19D, 17W
|((Party shading/Democratic))|39D, 31W, 2?
| rowspan=2 ((Party shading/Tie))|2NR, 2D
| rowspan=4 ((Party shading/Jacksonian)) |[[Thomas Morris (Ohio politician)|Thomas Morris]] <small>(J)</small>
|rowspan=2 ((Party shading/Democratic))|11D, 6NR, ((nowrap|2A-M))
|- style="height:2em"
!1834
|((Party shading/Democratic))|22D, 14NR
|((Party shading/Democratic))|46D, 26NR
|- style="height:2em"
!1835
|((Party shading/Democratic))|[[Benjamin B. Hinkson]] <small>(D)</small>
| rowspan=12 ((Party shading/Whig)) |[[Joseph Whitehill]] <small>(W)</small> 
|((Party shading/Democratic))|19D, 17W((efn|A Whig, [[Peter Hitchcock (judge)|Peter Hitchcock]], was elected as a minority-party Speaker of the Senate at organization. Another Whig, [[Charles Anthony (politician)|Charles Anthony]], was elected as a minority-party Speaker after Hitchcock resigned in March. In a special session in June concerning the [[Toledo War]], a Democrat, [[David Disney]], was elected as Speaker.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|pages=274, 276))</ref>))
|((Party shading/Whig))|42W, 29D, 1?
|((Party shading/Whig))|3W, 1D
|rowspan=2 ((Party shading/Tie))|9D, 9W, ((nowrap|1A-M))
|- style="height:2em"
!1836
|rowspan=2 ((Party shading/Whig))|[[Joseph Vance (Ohio politician)|Joseph Vance]] <small>(W)</small>
|rowspan=4 ((Party shading/Democratic))|[[Carter B. Harlan]] <small>(D)</small>
|((Party shading/Democratic))|20D, 16W
|((Party shading/Democratic))|46D, 26W
| rowspan=6 ((Party shading/Tie))|2D, 2W
|rowspan=4  ((Party shading/Whig))|[[William Henry Harrison]]/<br/>[[Francis Granger]] <small>(W)</small> ((Nay))
|- style="height:2em"
!1837
|((Party shading/Whig))|20W, 16D((efn|Democrat [[Elijah Vance]] was re-elected as a minority-party Speaker of the Senate.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=277))</ref>))
|((Party shading/Democratic))|37D, 35W
| rowspan=2 ((Party shading/Democratic))|[[Thomas Morris (Ohio politician)|Thomas Morris]] <small>(D)</small>
| rowspan=10 ((Party shading/Democratic)) |[[William Allen (governor)|William Allen]] <small>(D)</small>
|rowspan=2 ((Party shading/Whig))|11W, 8D
|- style="height:2em"
!1838
|rowspan=2 ((Party shading/Democratic))|[[Wilson Shannon]] <small>(D)</small>
|((Party shading/Whig))|20W, 16D
|((Party shading/Whig))|40W, 32D
|- style="height:2em"
!1839
|rowspan=7 ((Party shading/Democratic))|[[John Brough]] <small>(D)</small>
|((Party shading/Democratic))|19D, 17W
|((Party shading/Democratic))|38D, 34W
| rowspan=8 ((Party shading/Democratic))|[[Benjamin Tappan]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|11D, 8W
|- style="height:2em"
!1840
|rowspan=2 ((Party shading/Whig))|[[Thomas Corwin]] <small>(W)</small>
|((Party shading/Democratic))|[[William Trevitt]] <small>(D)</small>
|((Party shading/Democratic))|25D, 11W
|((Party shading/Democratic))|48D, 24W
| rowspan=4 ((Party shading/Whig)) |[[William Henry Harrison]]/<br/>[[John Tyler]] <small>(W)</small> ((Aye))
|- style="height:2em"
!1841
|rowspan=3 ((Party shading/Whig))|[[John Sloane (Ohio politician)|John Sloane]] <small>(W)</small>
|((Party shading/Democratic))|22D, 14W
|((Party shading/Whig))|51W, 21D
|rowspan=2 ((Party shading/Whig))|12W, 7D
|- style="height:2em"
!1842
|rowspan=2 ((Party shading/Democratic))|[[Wilson Shannon]] <small>(D)</small>((efn|Resigned to become [[United States Ambassador to Mexico|United States minister to Mexico]].))
|((Party shading/Democratic))|19D, 17W
|((Party shading/Democratic))|37D, 35W
| rowspan=5 ((Party shading/Democratic))|3D, 1W
|- style="height:2em"
!1843
|((Party shading/Democratic))|22D, 14W
|((Party shading/Democratic))|39D, 33W
|rowspan=3 ((Party shading/Democratic))|12D, 9W
|- style="height:2em"
!rowspan=2|1844
|((Party shading/Democratic))|[[Thomas W. Bartley]] <small>(D)</small>((efn|name=speaker-acted))
| rowspan=3 ((Party shading/Whig)) |[[Samuel Galloway]] <small>(W)</small>
|rowspan=2 ((Party shading/Democratic))|20D, 16W
|rowspan=2 ((Party shading/Whig))|38W, 34D
| rowspan=3 ((Party shading/Whig)) |[[Henry Clay]]/<br/>[[Theodore Frelinghuysen]] <small>(W)</small> ((Nay))
|- style="height:2em"
|rowspan=2 ((Party shading/Whig))|[[Mordecai Bartley]] <small>(W)</small>
|- style="height:2em"
!1845
| ((Party shading/Whig)) |[[John Woods (Ohio politician)|John Woods]] <small>(W)</small>
|((Party shading/Whig))|22W, 14D
|((Party shading/Whig))|41W, 31D
| ((Party shading/Democratic)) |13D, 8W
|- style="height:2em"
!rowspan=2|Year!![[List of governors of Ohio|Governor]]!![[Ohio Secretary of State|Secretary of State]]!![[Ohio State Treasurer|Treasurer]]!![[Ohio State Auditor|Auditor]]!![[Ohio Senate|State Senate]]!![[Ohio House of Representatives|State House]]!!rowspan=2|[[Supreme Court of Ohio|Ohio<br/>Supreme<br/>Court]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class I)]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class III)]]!![[List of United States representatives from Ohio|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan=4 |Executive offices!!colspan=2|[[Ohio General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Ohio|United States Congress]]
|}

==1846–present==
{|class=wikitable style="text-align:center"
!rowspan=2|Year!!colspan=6|Executive offices!!colspan=2|[[Ohio General Assembly|State Legislature]]!! rowspan=2 |[[Supreme Court of Ohio|Ohio<br/>Supreme<br/>Court]]!!colspan=3|[[United States congressional delegations from Ohio|United States Congress]]!!rowspan=2|[[United States presidential election|Electoral votes]]
|- style="height:2em"
![[List of governors of Ohio|Governor]]!![[List of lieutenant governors of Ohio|Lt. Governor]]!![[Ohio Attorney General|Attorney General]]!![[Ohio Secretary of State|Secretary of State]]!![[Ohio State Treasurer|Treasurer]]!![[Ohio State Auditor|Auditor]]!![[Ohio Senate|State Senate]]!![[Ohio House of Representatives|State House]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class I)]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class III)]]!![[List of United States representatives from Ohio|U.S. House]]
|- style="height:2em"
!1846
|rowspan=3 ((Party shading/Whig))|[[William Bebb]] <small>(W)</small>((efn|name=bebb|Bebb's term officially ended in December 1848. However, due to the large number of close elections that year, the General Assembly was delayed in qualifying governor-elect [[Seabury Ford]], and Bebb remained in office for an extra few weeks.))
| rowspan=6 |((efn|The office of lieutenant governor was created by the 1851 Constitution, first being filled in 1852.))
|rowspan=5 ((Party shading/Whig))|[[Henry Stanbery]] <small>(W)</small>
| rowspan=4 ((Party shading/Whig))|[[Samuel Galloway]] <small>(W)</small>
|((Party shading/Whig))|[[Joseph Whitehill]] <small>(W)</small>
| rowspan=6 ((Party shading/Whig))|[[John Woods (Ohio politician)|John Woods]] <small>(W)</small>
|((Party shading/Whig))|21W, 15D
|((Party shading/Whig))|44W, 28D
|((Party shading/Democratic))|3D, 1W
|rowspan=4 ((Party shading/Whig))|[[Thomas Corwin]] <small>(W)</small>
| rowspan=4 ((Party shading/Democratic))|[[William Allen (governor)|William Allen]] <small>(D)</small>
|((Party shading/Democratic))|13D, 8W
| rowspan=2 |
|- style="height:2em"
!1847
|rowspan=5 ((Party shading/Whig))|[[Albert A. Bliss]] <small>(W)</small>
|((Party shading/Democratic))|18D, 18W((efn|A Democrat, Brewster Randall, was chosen as Speaker of the Senate on the 1st Ballot.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=301))</ref>))
|((Party shading/Whig))|39W, 32D, 1I
|rowspan=4 ((Party shading/Tie))|2D, 2W
|rowspan=2 ((Party shading/Whig))|11W, 10D
|- style="height:2em"
!1848
|((Party shading/Whig))|19W, 17D
|((Party shading/Whig))|40W, 32D
|rowspan=4 ((Party shading/Democratic))|[[Lewis Cass]]/<br/>[[William Orlando Butler]] <small>(D)</small> ((Nay))
|- style="height:2em"
!1849
|((Party shading/Whig))|[[Seabury Ford]] <small>(W)</small>((efn|name=bebb))
|((Party shading/Whig))|18W, 18D((efn|A Free Soiler who ran on the Whig ticket, Brewster Randall, was chosen as Speaker of the Senate on the 16th Ballot.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=306))</ref>))
|((Party shading/Whig))|37W, 35D((efn|A Democrat, [[John G. Breslin]], was elected as a minority-party Speaker on the 3rd Ballot.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=309))</ref>))
|rowspan=2 ((Party shading/Democratic))|11D, 8W, 2FS
|- style="height:2em"
!1850
|rowspan=3 ((Party shading/Democratic))|[[Reuben Wood]] <small>(D)</small>((efn|Wood's first term was truncated to one year, due to the 1851 constitution's moving elections one year back to odd-numbered years; resigned to become [[consul (representative)|consul]] in [[Valparaíso]], [[Chile]].))
|rowspan=2 ((Party shading/Free Soil))|[[Henry W. King]] <small>(FS)</small>
|((Party shading/Whig))|16W, 16D, 4FS((efn|A Whig, [[Harrison G. O. Blake]], was chosen as Speaker of the Senate on the 301st Ballot.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=312))</ref>))
|((Party shading/Whig))|36W, 29D, 7FS((efn|A Democrat, [[Benjamin F. Leiter]], was elected as a minority-party Speaker on the 10th Ballot.<ref>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=314))</ref>))
|((Party shading/Whig))|[[Thomas Ewing]] <small>(W)</small>
|rowspan=6 ((Party shading/Free Soil))|[[Salmon P. Chase]] <small>(FS)</small>
|- style="height:2em"
!1851
|((Party shading/Democratic))|[[Joseph McCormick (Ohio lawyer)|Joseph McCormick]] <small>(D)</small>
|((Party shading/Whig))|17W, 16D, 3FS((efn|A Whig, [[Charles Cleveland Convers]], was elected as Speaker of the Senate in coalition with the Free Soilers on the 14th Ballot.<ref name=p315>((Cite book|last=Ohio|url=https://books.google.com/books?id=Z5tEAQAAMAAJ|title=Message and Annual Reports for ..., Made to the ... General Assembly of Ohio ..|date=1876|publisher=Richard Nevins, state printer|language=en|page=315))</ref>))
|((Party shading/Whig))|34W, 32D, 6FS((efn|A Free Soiler, [[John F. Morse]], was elected as Speaker in coalition with the Democrats on the 11th Ballot.<ref name=p315/>))
|((Party shading/Democratic))|3D, 1W
| rowspan=5 ((Party shading/Whig)) |[[Benjamin Wade]] <small>(W)</small>
|rowspan=2 ((Party shading/Democratic))|11D, 9W, 1FS
|- style="height:2em"
!1852
|((Party shading/Democratic))|[[William Medill]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[George E. Pugh]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[William Trevitt]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[John G. Breslin]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[William Duane Morgan]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|24D, 9W, 1FS((efn|name=2yr|Due to the approval of the [[Constitution of Ohio|Ohio Constitution of 1851]], legislators began to serve two-year terms.))
|rowspan=2 ((Party shading/Democratic))|65D, 28W, 1FS((efn|name=2yr))
|rowspan=3 ((Party shading/Democratic))|5D
|rowspan=4 ((Party shading/Democratic))|[[Franklin Pierce]]/<br/>[[William R. King]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1853
|rowspan=3 ((Party shading/Democratic))|[[William Medill]] <small>(D)</small>((efn|name=lt-elected|As lieutenant governor, filled unexpired term, and was later elected in his own right.))
|rowspan=3 ((Party shading/Democratic))|[[James Myers (politician)|James Myers]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|12D, 7W, 2FS
|- style="height:2em"
!1854
|rowspan=2 ((Party shading/Democratic))|[[George Wythe McCook]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|26D, 7W
|rowspan=2 ((Party shading/Democratic))|70D, 17W, 9FS
|- style="height:2em"
!1855
|((Party shading/Democratic))|4D, 1R
|rowspan=2 ((Party shading/Republican))|21 A-Neb.
|- style="height:2em"
!1856
|rowspan=4 ((Party shading/Republican))|[[Salmon P. Chase]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Thomas H. Ford]] <small>(R)</small><ref>[[#smith1898|Smith 1898]] : 40</ref>
|((Party shading/Republican))|[[Francis D. Kimball]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[James H. Baker (politician)|James H. Baker]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[William Harvey Gibson|William H. Gibson]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Francis Mastin Wright|Francis M. Wright]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|29R, 6D
|rowspan=2 ((Party shading/Republican))|78R, 34D
|((Party shading/Republican))|3R, 2D
| rowspan=14 ((Party shading/Republican)) |[[Benjamin Wade]] <small>(R)</small>
| rowspan=5 ((Party shading/Democratic)) |[[George E. Pugh]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|[[John C. Frémont]]/<br/>[[William L. Dayton]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1857
|rowspan=4 ((Party shading/Republican))|[[Christopher Wolcott]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|4R, 1D
|rowspan=2 ((Party shading/Republican))|13R, 8D
|- style="height:2em"
!1858
|rowspan=2 ((Party shading/Republican))|[[Martin Welker]] <small>(R)</small><ref>[[#smith1898|Smith 1898]] : 74</ref>
| rowspan=5 ((Party shading/Republican)) |[[Addison Peale Russell]] <small>(R)</small>
| rowspan=5 ((Party shading/Republican)) |[[Alfred P. Stone]] <small>(R)</small>
|rowspan=2 ((Party shading/Democratic))|20D, 13R
|rowspan=2 ((Party shading/Democratic))|62D, 44R, 1I
|- style="height:2em"
!1859
| rowspan=5 ((Party shading/Republican)) |5R
| rowspan=3 ((Party shading/Republican)) |15R, 6D
|- style="height:2em"
!1860
| rowspan=3 ((Party shading/Republican)) |[[William Dennison Jr.]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |[[Robert C. Kirk]] <small>(R)</small>
| rowspan=4 ((Party shading/Republican)) |[[Robert Walker Tayler Sr.]] <small>(R)</small>
| rowspan=3 ((Party shading/Republican)) |25R, 10D
| rowspan=3 ((Party shading/Republican)) |58R, 46D, 1I
| rowspan=5 ((Party shading/Republican)) |[[Abraham Lincoln]]/<br/>[[Hannibal Hamlin]] <small>(R)</small> ((Aye))
|- style="height:2em"
! rowspan=2 |1861
| rowspan=3 ((Party shading/Republican))|[[James Murray (Ohio politician)|James Murray]] <small>(R)</small>
|((Party shading/Republican))|[[Salmon P. Chase]] <small>(R)</small>
|- style="height:2em"
| rowspan=16 ((Party shading/Republican)) |[[John Sherman]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |13R, 8D
|- style="height:2em"
!1862
|rowspan=2 ((Party shading/Republican))|[[David Tod]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Benjamin Stanton]] <small>(R)</small>
|((Party shading/Republican))|[[Benjamin R. Cowen]] <small>(R)</small>
|rowspan=3 ((Party shading/Republican))|[[G. V. Dorsey]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|26R, 8D
|rowspan=2 ((Party shading/Republican))|74R, 23D
|- style="height:2em"
!1863
|rowspan=2 ((Party shading/Democratic))|[[Lyman R. Critchfield]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[William W. Armstrong (journalist)|William W. Armstrong]] <small>(D)</small>
|((Party shading/Republican))|[[Oviatt Cole]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|4R, 1D
|rowspan=2 ((Party shading/Democratic))|14D, 5R
|- style="height:2em"
!1864
|((Party shading/Republican))|[[John Brough]] <small>(R)</small>((efn|name=died|Died in office.))
|((Party shading/Republican))|[[Charles Anderson (governor)|Charles Anderson]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[James H. Godman]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|30R, 4D
|rowspan=2 ((Party shading/Republican))|76R, 21D
|rowspan=4 ((Party shading/National Union))|[[Abraham Lincoln]]/<br/>[[Andrew Johnson]] <small>(NU)</small> ((Aye))
|- style="height:2em"
!1865
|((Party shading/Republican))|[[Charles Anderson (governor)|Charles Anderson]] <small>(R)</small>((efn|name=lt-filled|As lieutenant governor, filled unexpired term.))
|''vacant''
|((Party shading/Republican))|[[William P. Richardson (Ohio politician)|William P. Richardson]] <small>(R)</small>
|rowspan=3 ((Party shading/Republican))|[[William Henry Smith (American politician)|William Henry Smith]] <small>(R)</small>
|((Party shading/Republican))|[[William Hooper (Ohio businessman)|William Hooper]] <small>(R)</small>
|rowspan=10 ((Party shading/Republican))|5R
|rowspan=2 ((Party shading/Republican))|17R, 2D
|- style="height:2em"
!1866
|rowspan=2 ((Party shading/Republican))|[[Jacob Dolson Cox]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Andrew McBurney]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[William H. West (judge)|William H. West]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[S. S. Warner]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|25R, 12D
|rowspan=2 ((Party shading/Republican))|71R, 34D
|- style="height:2em"
!1867
|rowspan=2 ((Party shading/Republican))|16R, 3D
|- style="height:2em"
!1868
|rowspan=4 ((Party shading/Republican))|[[Rutherford B. Hayes]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[John C. Lee]] <small>(R)</small>
|((Party shading/Republican))|[[John Russell (Ohio politician)|John Russell]] <small>(R)</small>
|rowspan=2 ((Party shading/Democratic))|18D, 17R
|rowspan=2 ((Party shading/Democratic))|56D, 49R
|rowspan=4 ((Party shading/Republican))|[[Ulysses S. Grant]]/<br/>[[Schuyler Colfax]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1869
|rowspan=4 ((Party shading/Republican))|[[Isaac R. Sherwood]] <small>(R)</small>
|rowspan=12 ((Party shading/Democratic))|[[Allen G. Thurman]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|13R, 6D
|- style="height:2em"
!1870
|rowspan=4 ((Party shading/Republican))|[[Francis Bates Pond]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|19R, 18D
|rowspan=2 ((Party shading/Republican))|57R, 54D
|- style="height:2em"
!1871
|rowspan=2 ((Party shading/Republican))|14R, 5D
|- style="height:2em"
!1872
|rowspan=2 ((Party shading/Republican))|[[Edward Follansbee Noyes]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Jacob Mueller]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Isaac Welsh]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[James Williams (Ohio politician)|James Williams]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|18R, 18D((efn|Though the Senate was tied, the Republicans had control of the Senate Presidency due to the tie-breaking vote of the Lt. Governor.<ref>((Cite book|last1=Taylor|first1=William Alexander|url=https://books.google.com/books?id=OioWAAAAYAAJ|title=Ohio Statesmen and Annals of Progress: From the Year 1788 to the Year 1900 ...|last2=Taylor|first2=Aubrey Clarence|date=1899|publisher=Press of the Westbote Company|language=en))</ref>))
|rowspan=2 ((Party shading/Republican))|57R, 48D
|rowspan=4 ((Party shading/Republican))|[[Ulysses S. Grant]]/<br/>[[Henry Wilson]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1873
|rowspan=2 ((Party shading/Republican))|[[Allen T. Wikoff]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|14R, 6D
|- style="height:2em"
!1874
|rowspan=2 ((Party shading/Democratic))|[[William Allen (governor)|William Allen]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|[[Alphonso Hart]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[John Little (congressman)|John Little]] <small>(R)</small>
|rowspan=2 ((Party shading/Democratic))|22D, 14R
|rowspan=2 ((Party shading/Democratic))|58D, 44R, 3I
|- style="height:2em"
!1875
|rowspan=2 ((Party shading/Democratic))|[[William Bell Jr. (politician)|William Bell Jr.]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|3R, 2D
|rowspan=2 ((Party shading/Democratic))|13D, 7R
|- style="height:2em"
!1876
|((Party shading/Republican))|[[Rutherford B. Hayes]] <small>(R)</small>((efn|name=pres|Resigned to become [[president of the United States]].))
|((Party shading/Republican))|[[Thomas L. Young]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[John M. Millikin]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|20R, 17D
|rowspan=2 ((Party shading/Republican))|65R, 46D
|rowspan=4  ((Party shading/Republican))|[[Rutherford B. Hayes]]/<br/>[[William A. Wheeler]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1877
|((Party shading/Republican))|[[Thomas L. Young]] <small>(R)</small>((efn|name=lt-filled))
|((Party shading/Republican))|[[H. W. Curtiss]] <small>(R)</small>((efn|name=acting|Acting.))
|rowspan=4 ((Party shading/Republican))|[[Milton Barnes (politician)|Milton Barnes]] <small>(R)</small>
|((Party shading/Republican))|4R, 1D
|rowspan=2 ((Party shading/Republican))|[[Stanley Matthews (judge)|Stanley Matthews]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|12R, 8D
|- style="height:2em"
!1878
|rowspan=2 ((Party shading/Democratic))|[[Richard M. Bishop]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Jabez W. Fitch]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Isaiah Pillars]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Anthony Howells]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|25D, 10R
|rowspan=2 ((Party shading/Democratic))|68D, 38R, 3G
|rowspan=2 ((Party shading/Republican))|3R, 2D
|- style="height:2em"
!1879
|rowspan=6 ((Party shading/Democratic))|[[George H. Pendleton]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|11D, 9R
|- style="height:2em"
!1880
|rowspan=4 ((Party shading/Republican))|[[Charles Foster (Ohio politician)|Charles Foster]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Andrew Hickenlooper]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[George K. Nash]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Joseph Turney]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[John F. Oglevee]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|23R, 14D
|rowspan=2 ((Party shading/Republican))|69R, 45D
|rowspan=4 ((Party shading/Republican))|4R, 1D
|rowspan=4 ((Party shading/Republican))|[[James A. Garfield]]/<br/>[[Chester A. Arthur]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1881
|rowspan=2 ((Party shading/Republican))|[[Charles Townsend (Ohio politician)|Charles Townsend]] <small>(R)</small>
|rowspan=17 ((Party shading/Republican))|[[John Sherman]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|15R, 5D
|- style="height:2em"
!1882
|rowspan=2 ((Party shading/Republican))|[[Rees G. Richards]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|22R, 11D
|rowspan=2 ((Party shading/Republican))|70R, 35D
|- style="height:2em"
!1883
|rowspan=2 ((Party shading/Democratic))|[[James W. Newman]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|13D, 8R
|- style="height:2em"
!1884
|rowspan=2 ((Party shading/Democratic))|[[George Hoadly]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[John G. Warwick]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[James Lawrence (Ohio politician)|James Lawrence]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Peter Brady (politician)|Peter Brady]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Emil Kiesewetter]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|22D, 11R
|rowspan=2 ((Party shading/Democratic))|60D, 45R
|rowspan=2 ((Party shading/Democratic))|3D, 2R
|rowspan=4 ((Party shading/Republican))|[[James G. Blaine]]/<br/>[[John A. Logan]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1885
|rowspan=4 ((Party shading/Republican))|[[James S. Robinson]] <small>(R)</small>
|rowspan=7 ((Party shading/Democratic))|[[Henry B. Payne]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|11D, 10R
|- style="height:2em"
!1886
|rowspan=4 ((Party shading/Republican))|[[Joseph B. Foraker]] <small>(R)</small>
|((Party shading/Republican))|[[Robert P. Kennedy]] <small>(R)</small>((efn|Elected to [[United States House of Representatives]] representing [[Ohio's 8th congressional district]].))
|rowspan=2 ((Party shading/Republican))|[[Jacob A. Kohler]] <small>(R)</small>
|rowspan=7 ((Party shading/Republican))|[[John C. Brown (Ohio politician)|John C. Brown]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|21R, 16D((efn|There was a contest over four seats from [[Hamilton County, Ohio|Hamilton County]] and whether the Democrats or Republicans won them. The Democrats initially claimed the Senate Presidency under [[John O'Neill (congressman)|John O'Neill]]. After a compromise was worked out on not seating the four Democrats being contested, the 15 of the other 16 Democrats left the chamber, leaving it short of a quorum of 19. Some days later, a motion was made on the floor to accept the four Republicans, and it was granted. This allowed the Republicans to choose [[Silas A. Conrad]] as President pro tempore, and to organize and control the chamber.<ref>((Cite book|last1=Taylor|first1=William Alexander|url=https://archive.org/details/ohiostatesmenann00taylrich|title=Ohio statesmen and annals of progress, from the year 1788 to the year 1900 ..|last2=Taylor|first2=Aubrey Clarence|date=1899|publisher=Columbus, Ohio, Press of the Westbote Co.|others=University of California Libraries))</ref>))
|rowspan=2 ((Party shading/Republican))|68R, 42D
|((Party shading/Republican))|3R, 2D
|- style="height:2em"
!1887
|((Party shading/Republican))|[[Silas A. Conrad]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|4R, 1D
|rowspan=2 ((Party shading/Republican))|15R, 6D
|- style="height:2em"
!1888
|rowspan=2 ((Party shading/Republican))|[[William C. Lyon]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|[[David K. Watson]] <small>(R)</small>
|rowspan=9 ((Party shading/Republican))|[[Ebenezer W. Poe]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|25R, 11D
|rowspan=2 ((Party shading/Republican))|65R, 45D
|rowspan=5 ((Party shading/Republican))|[[Benjamin Harrison]]/<br/>[[Levi P. Morton]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1889
|rowspan=4 ((Party shading/Republican))|[[Daniel J. Ryan]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|5R
|rowspan=3 ((Party shading/Republican))|16R, 5D
|- style="height:2em"
!rowspan=2|1890
|rowspan=3 ((Party shading/Democratic))|[[James E. Campbell]] <small>(D)</small>
|((Party shading/Republican))|[[Elbert L. Lampson]] <small>(R)</small>
|rowspan=3 ((Party shading/Democratic))|19D, 17R
|rowspan=3 ((Party shading/Democratic))|60D, 54R
|- style="height:2em"
|rowspan=2 ((Party shading/Democratic))|[[William V. Marquis]] <small>(D)</small>
|- style="height:2em"
!1891
|rowspan=7 ((Party shading/Democratic))|[[Calvin S. Brice]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|14D, 7R
|- style="height:2em"
!1892
|rowspan=4 ((Party shading/Republican))|[[William McKinley]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Andrew L. Harris]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[John K. Richards]] <small>(R)</small>
|((Party shading/Republican))|[[Christian L. Poorman]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[William T. Cope]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|21R, 10D
|rowspan=2 ((Party shading/Republican))|72R, 35D
|rowspan=4 ((Party shading/Republican))|[[Benjamin Harrison]]/<br/>[[Whitelaw Reid]] <small>(R)</small> ((Nay))((efn|Grover Cleveland and Adlai Stevenson I <small>(D)</small> also carried 1 of Ohio's 23 electoral votes due to a faithless elector.))
|- style="height:2em"
!1893
|rowspan=4 ((Party shading/Republican))|[[Samuel McIntire Taylor]] <small>(R)</small>
|rowspan=20 ((Party shading/Republican))|6R
|rowspan=2 ((Party shading/Democratic))|11D, 10R
|- style="height:2em"
!1894
|rowspan=2 ((Party shading/Republican))|26R, 5D
|rowspan=2 ((Party shading/Republican))|85R, 22D
|- style="height:2em"
!1895
|rowspan=2 ((Party shading/Republican))|19R, 2D
|- style="height:2em"
!1896
|rowspan=4 ((Party shading/Republican))|[[Asa S. Bushnell]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Asa W. Jones]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Frank S. Monnett]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Samuel B. Campbell]] <small>(R)</small>
|rowspan=15 ((Party shading/Republican))|[[Walter D. Guilbert]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|30R, 6D, 1P
|rowspan=2 ((Party shading/Republican))|87R, 25D
|rowspan=4 ((Party shading/Republican))|[[William McKinley]]/<br/>[[Garret Hobart]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1897
|rowspan=4 ((Party shading/Republican))|[[Charles Kinney]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Mark Hanna]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|15R, 6D
|- style="height:2em"
!1898
|rowspan=2 ((Party shading/Democratic))|18D, 17R, 1IR((efn|The Independent Republican voted to give the Democrats control of the Senate Presidency and the chamber.<ref>((Cite book|url=https://books.google.com/books?id=V-clAAAAMAAJ|title=The Biographical Annals of Ohio, 1902-: A Handbook of the Government and Institutions of the State of Ohio. v. 1-|date=1898|language=en))</ref>))
|rowspan=2 ((Party shading/Republican))|62R, 47D
|rowspan=13 ((Party shading/Republican))|[[Joseph B. Foraker]] <small>(R)</small>
|- style="height:2em"
!1899
|- style="height:2em"
!1900
|rowspan=5 ((Party shading/Republican))|[[George K. Nash]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[John A. Caldwell]]
|rowspan=5 ((Party shading/Republican))|[[John M. Sheets]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|[[Isaac B. Cameron]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|19R, 11D, 1IR
|rowspan=2 ((Party shading/Republican))|62R, 45D, 3IR
|rowspan=5 ((Party shading/Republican))|[[William McKinley]]/<br/>[[Theodore Roosevelt]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1901
|rowspan=8 ((Party shading/Republican))|[[Lewis C. Laylin]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|17R, 4D
|- style="height:2em"
!rowspan=2|1902
|((Party shading/Republican))|[[Carl L. Nippert]] <small>(R)</small>
|rowspan=3 ((Party shading/Republican))|21R, 12D
|rowspan=3 ((Party shading/Republican))|68R, 42D
|- style="height:2em"
|rowspan=2 ((Party shading/Republican))|[[Harry L. Gordon]] <small>(R)</small>
|- style="height:2em"
!1903
|- style="height:2em"
!1904
|rowspan=2 ((Party shading/Republican))|[[Myron T. Herrick]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Warren G. Harding]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[Wade H. Ellis]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[William S. McKinnon]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|29R, 4D
|rowspan=2 ((Party shading/Republican))|88R, 22D
|rowspan=8 ((Party shading/Republican))|[[Charles W. F. Dick]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|[[Theodore Roosevelt]]/<br/>[[Charles W. Fairbanks]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1905
|rowspan=3 ((Party shading/Republican))|20R, 1D
|- style="height:2em"
!rowspan=2|1906
|((Party shading/Democratic))|[[John M. Pattison]] <small>(D)</small>((efn|name=died))((efn|name=pattison|A 1905 amendment to the state constitution shifted elections forward one year, to take place on even years; thus Pattison's term, completed by Lieutenant Governor Andrew L. Harris Harris, was extended to three years.))
|((Party shading/Republican))|[[Andrew L. Harris]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|18D, 18R, 1I((efn|The Independent voted to give the Democrats control of the Senate Presidency and the chamber.<ref>((Cite book|url=https://books.google.com/books?id=V-clAAAAMAAJ|title=The Biographical Annals of Ohio, 1902-: A Handbook of the Government and Institutions of the State of Ohio. v. 1-|date=1898|language=en))</ref>))((efn|name=3yr|Due to a state constitutional amendment, every legislator elected in 1905 served a three-year term, and would serve two-year terms afterward.))
|rowspan=4 ((Party shading/Republican))|62R, 75D, 2I((efn|name=3yr))
|- style="height:2em"
|rowspan=3 ((Party shading/Republican))|[[Andrew L. Harris]] <small>(R)</small>((efn|name=lt-filled))((efn|name=pattison))
|rowspan=3|''vacant''
|- style="height:2em"
!1907
|rowspan=4 ((Party shading/Republican))|[[Carmi Thompson]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|16R, 5D
|- style="height:2em"
!1908
|rowspan=4 ((Party shading/Republican))|[[William Howard Taft]]/<br/>[[James S. Sherman]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1909
|rowspan=4 ((Party shading/Democratic))|[[Judson Harmon]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|[[Francis W. Treadway]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Ulysses G. Denman]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[David S. Creamer]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|[[Edward M. Fullington]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|20R, 14D
|rowspan=2 ((Party shading/Republican))|71R, 45D, 1I
|rowspan=6 ((Party shading/Republican))|[[Theodore E. Burton]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|13R, 8D
|- style="height:2em"
!1910
|- style="height:2em"
!1911
|((Party shading/Democratic))|[[Atlee Pomerene]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Timothy Sylvester Hogan (politician)|Timothy Sylvester Hogan]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Charles H. Graves (Ohio politician)|Charles H. Graves]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|19D, 15R
|rowspan=2 ((Party shading/Democratic))|70D, 49R
|rowspan=2 ((Party shading/Republican))|4R, 2D
|rowspan=12 ((Party shading/Democratic))|[[Atlee Pomerene]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|16D, 5R
|- style="height:2em"
!1912
|((Party shading/Democratic))|[[Hugh L. Nichols]] <small>(D)</small>
|rowspan=8 ((Party shading/Democratic))|[[Woodrow Wilson]]/<br/>[[Thomas R. Marshall]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1913
|rowspan=2 ((Party shading/Democratic))|[[James M. Cox]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[W. A. Greenlund]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[John P. Brennan]] <small>(D)</small>
|rowspan=8 ((Party shading/Democratic))|[[Vic Donahey]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|26D, 7R
|rowspan=2 ((Party shading/Democratic))|87D, 33R, 3Prog
|rowspan=2 ((Party shading/Democratic))|5D, 2R
|rowspan=2 ((Party shading/Democratic))|19D, 3R
|- style="height:2em"
!1914
|- style="height:2em"
!1915
|rowspan=2 ((Party shading/Republican))|[[Frank B. Willis]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[John H. Arnold (politician)|John H. Arnold]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Edward C. Turner]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Charles Q. Hildebrant]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Rudolph W. Archer]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|20R, 13D
|rowspan=2 ((Party shading/Republican))|72R, 50D, 1Prog
|rowspan=4 ((Party shading/Democratic))|4D, 3R
|rowspan=6 ((Party shading/Republican))|[[Warren G. Harding]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|13R, 9D
|- style="height:2em"
!1916
|- style="height:2em"
!1917
|rowspan=4 ((Party shading/Democratic))|James M. Cox <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Earl D. Bloom]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Joseph McGhee]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[William D. Fulton]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Chester E. Bryan]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|25D, 11R
|rowspan=2 ((Party shading/Democratic))|72D, 56R
|rowspan=2 ((Party shading/Democratic))|13D, 9R
|- style="height:2em"
!1918
|- style="height:2em"
!1919
|rowspan=4 ((Party shading/Republican))|[[Clarence J. Brown]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[John G. Price]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Harvey C. Smith]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Rudolph W. Archer]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|27R, 7D
|rowspan=2 ((Party shading/Republican))|100R, 36D
|rowspan=2 ((Party shading/Republican))|4R, 3D
|rowspan=2 ((Party shading/Republican))|14R, 8D
|- style="height:2em"
!1920
|rowspan=4 ((Party shading/Republican))|[[Warren G. Harding]]/<br/>[[Calvin Coolidge]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1921
|rowspan=2 ((Party shading/Republican))|[[Harry L. Davis]] <small>(R)</small>
|rowspan=17 ((Party shading/Republican))|[[Joseph T. Tracy]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|36R, 1D
|rowspan=2 ((Party shading/Republican))|113R, 12D
|rowspan=12 ((Party shading/Republican))|6R, 1D
|rowspan=7 ((Party shading/Republican))|[[Frank B. Willis]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|22R
|- style="height:2em"
!1922
|- style="height:2em"
!1923
|rowspan=7 ((Party shading/Democratic))|[[Vic Donahey]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Earl D. Bloom]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|[[Charles C. Crabbe]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Thad H. Brown]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Harry S. Day]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|31R, 4D
|rowspan=2 ((Party shading/Republican))|103R, 27D
|rowspan=13 ((Party shading/Republican))|[[Simeon D. Fess]] <small>(R)</small>
|rowspan=7 ((Party shading/Republican))|16R, 6D
|- style="height:2em"
!1924
|rowspan=5 ((Party shading/Republican))|[[Calvin Coolidge]]/<br/>[[Charles G. Dawes]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1925
|rowspan=2 ((Party shading/Republican))|[[Charles H. Lewis]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|33R, 2D
|rowspan=2 ((Party shading/Republican))|110R, 20D
|- style="height:2em"
!1926
|- style="height:2em"
!1927
|((Party shading/Democratic))|[[Earl D. Bloom]] <small>(D)</small>
|rowspan=3 ((Party shading/Republican))|[[Edward C. Turner]] <small>(R)</small>
|rowspan=7 ((Party shading/Republican))|[[Clarence J. Brown]] <small>(R)</small>
|rowspan=3 ((Party shading/Republican))|[[Bert B. Buckley]] <small>(R)</small>
|rowspan=3 ((Party shading/Republican))|35R, 2D
|rowspan=3 ((Party shading/Republican))|103R, 33D
|- style="height:2em"
!rowspan=2|1928
|((Party shading/Democratic))|[[William G. Pickrel]] <small>(D)</small>
|((Party shading/Democratic))|[[Cyrus Locher]] <small>(D)</small>
|- style="height:2em"
|((Party shading/Republican))|[[George C. Braden]] <small>(R)</small>
|((Party shading/Republican))|[[Theodore E. Burton]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Herbert Hoover]]/<br/>[[Charles Curtis]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1929
|rowspan=2 ((Party shading/Republican))|[[Myers Y. Cooper]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[John T. Brown]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Gilbert Bettman]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[H. Ross Ake]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|31R
|rowspan=2 ((Party shading/Republican))|122R, 11D
|((Party shading/Republican))|[[Roscoe C. McCulloch]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|19R, 3D
|- style="height:2em"
!1930
|rowspan=9 ((Party shading/Democratic))|[[Robert J. Bulkley]] <small>(D)</small>
|- style="height:2em"
!1931
|rowspan=4 ((Party shading/Democratic))|[[George White (Ohio politician)|George White]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[William G. Pickrel]] <small>(D)</small>
|rowspan=6 ((Party shading/Republican))|[[Harry S. Day]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|18R, 14D
|rowspan=2 ((Party shading/Republican))|70R, 58D
|rowspan=2 ((Party shading/Republican))|13R, 9D
|- style="height:2em"
!1932
|((Party shading/Republican))|5R, 2D
|rowspan=8 ((Party shading/Democratic))|[[Franklin D. Roosevelt]]/<br/>[[John Nance Garner]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1933
|rowspan=2 ((Party shading/Democratic))|[[Charles W. Sawyer]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|[[John W. Bricker]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[George S. Myers (judge)|George S. Myers]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|16D, 16R((efn|Though the Senate was tied, the Democrats had control of the Senate Presidency due to the tie-breaking vote of the Lt. Governor.))
|rowspan=2 ((Party shading/Democratic))|84D, 51R
|((Party shading/Republican))|4R, 3D
|rowspan=4 ((Party shading/Democratic))|18D, 6R
|- style="height:2em"
!1934
|((Party shading/Democratic))|5D, 2R
|- style="height:2em"
!1935
|rowspan=4 ((Party shading/Democratic))|[[Martin L. Davey]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Harold G. Mosier]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|19D, 13R
|rowspan=2 ((Party shading/Republican))|68R, 67D((efn|Elected a Democratic Speaker.))
|rowspan=3 ((Party shading/Republican))|4R, 3D
|rowspan=6 ((Party shading/Democratic))|[[Vic Donahey]] <small>(D)</small>
|- style="height:2em"
!1936
|- style="height:2em"
!1937
|rowspan=2 ((Party shading/Democratic))|[[Paul P. Yoder]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Herbert S. Duffy]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[William Kennedy (Ohio politician)|William Kennedy]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Clarence H. Knisley]] <small>(D)</small>
|rowspan=16 ((Party shading/Democratic))|[[Joseph T. Ferguson]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|31D, 5R
|rowspan=2 ((Party shading/Democratic))|105D, 33R
|rowspan=2 ((Party shading/Democratic))|21D, 3R
|- style="height:2em"
!1938
|((Party shading/Democratic))|4D, 3R
|- style="height:2em"
!1939
|rowspan=6 ((Party shading/Republican))|[[John W. Bricker]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[Paul M. Herbert]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[Thomas J. Herbert]] <small>(R)</small>
|((Party shading/Republican))|[[Earl Griffith]] <small>(R)</small>
|rowspan=12 ((Party shading/Republican))|[[Don H. Ebright]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|27R, 7D
|rowspan=2 ((Party shading/Republican))|100R, 36D
|rowspan=2 ((Party shading/Republican))|4R, 3D
|rowspan=14 ((Party shading/Republican))|[[Robert A. Taft]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|15R, 9D
|- style="height:2em"
!1940
|((Party shading/Republican))|[[George M. Neffiner]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[Franklin D. Roosevelt]]/<br/>[[Henry A. Wallace]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1941
|rowspan=2 ((Party shading/Democratic))|[[John E. Sweeney (Ohio politician)|John E. Sweeney]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|19R, 17D
|rowspan=2 ((Party shading/Republican))|78R, 60D
|rowspan=6 ((Party shading/Republican))|5R, 2D
|rowspan=4 ((Party shading/Republican))|[[Harold H. Burton]] <small>(R)</small>
|rowspan=2 ((Party shading/Tie))|12R, 12D
|- style="height:2em"
!1942
|- style="height:2em"
!1943
|rowspan=6 ((Party shading/Republican))|[[Edward J. Hummel]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|28R, 5D
|rowspan=2 ((Party shading/Republican))|111R, 25D
|rowspan=2 ((Party shading/Republican))|20R, 3D
|- style="height:2em"
!1944
|rowspan=4 ((Party shading/Republican))|[[Thomas E. Dewey]]/<br/>[[John W. Bricker]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1945
|rowspan=2 ((Party shading/Democratic))|[[Frank Lausche]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[George D. Nye]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|[[Hugh S. Jenkins]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|20R, 13D
|rowspan=2 ((Party shading/Republican))|89R, 47D
|((Party shading/Democratic))|[[James W. Huffman]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|17R, 6D
|- style="height:2em"
!1946
|((Party shading/Republican))|[[Kingsley A. Taft]] <small>(R)</small>
|- style="height:2em"
!1947
|rowspan=2 ((Party shading/Republican))|[[Thomas J. Herbert]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Paul M. Herbert]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|32R, 4D
|rowspan=2 ((Party shading/Republican))|123R, 16D
|rowspan=2 ((Party shading/Republican))|4R, 3D
|rowspan=13 ((Party shading/Republican))|[[John W. Bricker]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|19R, 4D
|- style="height:2em"
!1948
|rowspan=4 ((Party shading/Democratic))|[[Harry S. Truman]]/<br/>[[Alben W. Barkley]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1949
|rowspan=8 ((Party shading/Democratic))|[[Frank Lausche]] <small>(D)</small>((efn|name=res-senate))
|rowspan=4 ((Party shading/Democratic))|George D. Nye <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Herbert S. Duffy]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|[[Donald K. Zoller]] <small>(R)</small>
|rowspan=2 ((Party shading/Democratic))|19D, 14R
|rowspan=2 ((Party shading/Democratic))|69D, 66R
|rowspan=5 ((Party shading/Republican))|5R, 2D
|rowspan=2 ((Party shading/Democratic))|12D, 11R
|- style="height:2em"
!1950
|- style="height:2em"
!1951
|rowspan=6 ((Party shading/Republican))|[[C. William O'Neill]] <small>(R)</small>
|rowspan=30 ((Party shading/Republican))|[[Ted W. Brown]] <small>(R)</small>
|rowspan=9 ((Party shading/Republican))|[[Roger W. Tracy]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|26R, 7D
|rowspan=2 ((Party shading/Republican))|98R, 36D, 1I
|rowspan=4 ((Party shading/Republican))|16R, 6D, 1I
|- style="height:2em"
!1952
|rowspan=9 ((Party shading/Republican))|[[Dwight D. Eisenhower]]/<br/>[[Richard Nixon]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1953
|rowspan=4 ((Party shading/Republican))|[[John William Brown|John W. Brown]] <small>(R)</small>
|rowspan=11 ((Party shading/Republican))|[[Jim Rhodes]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|23R, 10D
|rowspan=2 ((Party shading/Republican))|102R, 34D
|((Party shading/Democratic))|[[Thomas A. Burke]] <small>(D)</small>
|- style="height:2em"
!1954
|rowspan=10 ((Party shading/Republican))|4R, 3D
|rowspan=3 ((Party shading/Republican))|[[George H. Bender]] <small>(D)</small>
|- style="height:2em"
!1955
|rowspan=2 ((Party shading/Republican))|21R, 12D
|rowspan=2 ((Party shading/Republican))|89R, 47D
|rowspan=5 ((Party shading/Republican))|17R, 6D
|- style="height:2em"
!1956
|- style="height:2em"
!rowspan=2|1957
|((Party shading/Republican))|[[John William Brown|John W. Brown]] <small>(R)</small>((efn|name=lt-filled))
|''vacant''
|rowspan=3 ((Party shading/Republican))|[[William B. Saxbe]]<small>(R)</small>
|rowspan=3 ((Party shading/Republican))|22R, 12D
|rowspan=3 ((Party shading/Republican))|97R, 42D
|rowspan=13 ((Party shading/Democratic))|[[Frank Lausche]] <small>(D)</small>
|- style="height:2em"
|rowspan=2 ((Party shading/Republican))|[[C. William O'Neill]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Paul M. Herbert]] <small>(R)</small>
|- style="height:2em"
!1958
|- style="height:2em"
!1959
|rowspan=4 ((Party shading/Democratic))|[[Michael DiSalle]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[John W. Donahey]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Mark McElroy (Ohio politician)|Mark McElroy]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Joseph T. Ferguson]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|20D, 13R
|rowspan=2 ((Party shading/Democratic))|78D, 61R
|rowspan=12 ((Party shading/Democratic))|[[Stephen M. Young]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|15R, 8D
|- style="height:2em"
!1960
|rowspan=4 ((Party shading/Republican))|[[Richard Nixon]]/<br/>[[Henry Cabot Lodge Jr.]] <small>(R)</small> ((Nay))
|- style="height:2em"
!1961
|rowspan=2 ((Party shading/Republican))|20R, 18D
|rowspan=2 ((Party shading/Republican))|84R, 55D
|rowspan=2 ((Party shading/Republican))|16R, 7D
|- style="height:2em"
!1962
|- style="height:2em"
!1963
|rowspan=8 ((Party shading/Republican))|[[Jim Rhodes]] <small>(R)</small>
|rowspan=13 ((Party shading/Republican))|[[John William Brown]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|[[William B. Saxbe]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[John D. Herbert]] <small>(R)</small>
|((Party shading/Republican))|[[Roger W. Tracy]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|20R, 13D
|rowspan=2 ((Party shading/Republican))|88R, 49D
|rowspan=7 ((Party shading/Republican))|6R, 1D
|rowspan=2 ((Party shading/Republican))|18R, 6D
|- style="height:2em"
!1964
|((Party shading/Republican))|[[Chester W. Goble]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[Lyndon B. Johnson]]/<br/>[[Hubert Humphrey]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1965
|((Party shading/Republican))|[[Roger Cloud]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|16R, 16D((efn|Though the Senate was tied, the Republicans had control of the Senate Presidency due to the tie-breaking vote of the Lt. Governor.<ref>((Cite web|title=Ohio Senate Democrats unveil tactics|url=https://news.google.com/newspapers?id=aCYxAAAAIBAJ&sjid=VwEEAAAAIBAJ&pg=7299,2944560|access-date=2021-06-24|website=news.google.com))</ref>))
|rowspan=2 ((Party shading/Republican))|75R, 62D
|rowspan=2 ((Party shading/Republican))|14R, 10D
|- style="height:2em"
!1966
|((Party shading/Republican))|[[Archer E. Reilly]] <small>(R)</small>
|- style="height:2em"
!1967
|rowspan=4 ((Party shading/Republican))|[[Roger Cloud]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|23R, 10D
|rowspan=2 ((Party shading/Republican))|62R, 37D
|rowspan=2 ((Party shading/Republican))|19R, 5D
|- style="height:2em"
!1968
|rowspan=9 ((Party shading/Republican))|[[Richard Nixon]]/<br/>[[Spiro Agnew]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1969
|rowspan=2 ((Party shading/Republican))|[[Paul W. Brown]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|21R, 12D
|rowspan=2 ((Party shading/Republican))|64R, 35D
|rowspan=6 ((Party shading/Republican))|[[William B. Saxbe]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|18R, 6D
|- style="height:2em"
!1970
|rowspan=2 ((Party shading/Republican))|7R
|- style="height:2em"
!1971
|rowspan=5 ((Party shading/Democratic))|[[John J. Gilligan]] <small>(D)</small>
|rowspan=13 ((Party shading/Democratic))|[[William J. Brown (Ohio politician)|William J. Brown]] <small>(D)</small>
|rowspan=13 ((Party shading/Democratic))|[[Gertrude Walton Donahey]] <small>(D)</small>
|rowspan=5 ((Party shading/Democratic))|[[Joseph T. Ferguson]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|20R, 13D
|rowspan=2 ((Party shading/Republican))|54R, 45D
|rowspan=6 ((Party shading/Republican))|[[Robert Taft Jr.]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|17R, 7D
|- style="height:2em"
!1972
|((Party shading/Republican))|6R, 1D
|- style="height:2em"
!1973
|rowspan=3 ((Party shading/Republican))|17R, 16D
|rowspan=3 ((Party shading/Democratic))|57D, 42R
|rowspan=5 ((Party shading/Republican))|5R, 2D
|rowspan=3 ((Party shading/Republican))|16R, 7D
|- style="height:2em"
!rowspan=2|1974
|- style="height:2em"
|((Party shading/Democratic))|[[Howard Metzenbaum]] <small>(D)</small>
|- style="height:2em"
!1975
|rowspan=8 ((Party shading/Republican))|[[Jim Rhodes]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[Dick Celeste]] <small>(D)</small>
|rowspan=20 ((Party shading/Democratic))|[[Thomas E. Ferguson]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|21D, 12R
|rowspan=2 ((Party shading/Democratic))|59D, 40R
| rowspan=25 ((Party shading/Democratic)) |[[John Glenn]] <small>(D)</small>
|rowspan=2 ((Party shading/Republican))|15R, 8D
|- style="height:2em"
!1976
|rowspan=19 ((Party shading/Democratic))|[[Howard Metzenbaum]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Jimmy Carter]]/<br/>[[Walter Mondale]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1977
|rowspan=2 ((Party shading/Democratic))|62D, 37R
|rowspan=4 ((Party shading/Democratic))|4D, 3R
|rowspan=6 ((Party shading/Republican))|13R, 10D
|- style="height:2em"
!1978
|- style="height:2em"
!1979
|((Party shading/Republican))|[[George Voinovich]] <small>(R)</small>((efn|Resigned to become [[Mayor of Cleveland]].))
|rowspan=4 ((Party shading/Democratic))|[[Anthony J. Celebrezze Jr.]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|18D, 15R
|rowspan=2 ((Party shading/Democratic))|63D, 36R
|- style="height:2em"
!1980
|rowspan=3|''vacant''
|rowspan=8 ((Party shading/Republican))|[[Ronald Reagan]]/<br/>[[George H. W. Bush]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1981
|rowspan=2 ((Party shading/Republican))|18R, 15D
|rowspan=2 ((Party shading/Democratic))|56D, 43R
|rowspan=2 ((Party shading/Democratic))|5D, 2R
|- style="height:2em"
!1982
|- style="height:2em"
!1983
|rowspan=8 ((Party shading/Democratic))|[[Dick Celeste]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Myrl Shoemaker]] <small>(D)</small>((efn|name=died))
|rowspan=8 ((Party shading/Democratic))|[[Anthony J. Celebrezze Jr.]] <small>(D)</small>
|rowspan=8 ((party shading/Democratic))|[[Sherrod Brown]] <small>(D)</small>
|rowspan=11 ((Party shading/Democratic))|[[Mary Ellen Withrow]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|17D, 16R
|rowspan=2 ((Party shading/Democratic))|62D, 37R
|rowspan=2 ((party shading/Democratic))|6D, 1R
|rowspan=2 ((Party shading/Republican))|11R, 10D
|- style="height:2em"
!1984
|- style="height:2em"
!1985
|rowspan=2|''vacant''
|rowspan=4 ((Party shading/Republican))|18R, 15D
|rowspan=2 ((Party shading/Democratic))|59D, 40R
|rowspan=2 ((party shading/Democratic))|4D, 3R
|rowspan=8 ((Party shading/Democratic))|11D, 10R
|- style="height:2em"
!1986
|- style="height:2em"
!1987
|rowspan=4 ((Party shading/Democratic))|[[Paul Leonard (politician)|Paul Leonard]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|60D, 39R
|rowspan=8 ((Party shading/Republican))|4R, 3D
|- style="height:2em"
!1988
|rowspan=4 ((Party shading/Republican))|[[George H. W. Bush]]/<br/>[[Dan Quayle]] <small>(R)</small> ((Aye))
|- style="height:2em"
!1989
|rowspan=2 ((Party shading/Republican))|19R, 14D
|rowspan=2 ((Party shading/Democratic))|59D, 40R
|- style="height:2em"
!1990
|- style="height:2em"
!1991
| rowspan=8 ((Party shading/Republican)) |[[George Voinovich]] <small>(R)</small>((efn|name=res-senate))
|rowspan=4 ((Party shading/Republican))|[[Mike DeWine]] <small>(R)</small>
|rowspan=4 ((Party shading/Democratic))|[[Lee Fisher]] <small>(D)</small>
| rowspan=9 ((Party shading/Republican)) |[[Bob Taft]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|21R, 12D
|rowspan=2 ((Party shading/Democratic))|61D, 38R
|- style="height:2em"
!1992
| rowspan=9 ((Party shading/Democratic)) |[[Bill Clinton]]/<br/>[[Al Gore]] <small>(D)</small> ((Aye))
|- style="height:2em"
!1993
|rowspan=4 ((Party shading/Republican))|20R, 13D
|rowspan=2 ((Party shading/Democratic))|53D, 46R
|rowspan=2 ((Party shading/Democratic))|10D, 9R
|- style="height:2em"
!1994
| rowspan=6 ((Party shading/Republican)) |[[Ken Blackwell]] <small>(R)</small>
|- style="height:2em"
!1995
| rowspan=4 ((Party shading/Republican)) |[[Nancy Hollister]] <small>(R)</small>
| rowspan=9 ((Party shading/Republican)) |[[Betty Montgomery]] <small>(R)</small>
| rowspan=9 ((Party shading/Republican)) |[[Jim Petro]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|56R, 43D
| rowspan=11 ((Party shading/Republican)) |5R, 2D
| rowspan=14 ((Party shading/Republican)) |[[Mike DeWine]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|13R, 6D
|- style="height:2em"
!1996
|- style="height:2em"
!1997
| rowspan=7 ((Party shading/Republican)) |21R, 12D
| rowspan=3 ((Party shading/Republican)) |60R, 39D
| rowspan=7 ((Party shading/Republican)) |11R, 8D
|- style="height:2em"
! rowspan=2 |1998
|- style="height:2em"
| ((Party shading/Republican)) |[[Nancy Hollister]] <small>(R)</small>((efn|name=lt-filled))
|''vacant''
|- style="height:2em"
!1999
|rowspan=9 ((Party shading/Republican))|[[Bob Taft]] <small>(R)</small>
|rowspan=4 ((Party shading/Republican))|[[Maureen O'Connor]] <small>(R)</small>
|rowspan=9 ((Party shading/Republican))|[[Ken Blackwell]] <small>(R)</small>
|rowspan=7 ((Party shading/Republican))|[[Joe Deters]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|59R, 40D
|rowspan=15 ((Party shading/Republican))|[[George Voinovich]] <small>(R)</small>
|- style="height:2em"
!2000
|rowspan=9 ((Party shading/Republican))|[[George W. Bush]]/<br/>[[Dick Cheney]] <small>(R)</small> ((Aye))
|- style="height:2em"
!2001
|rowspan=2 ((Party shading/Republican))|60R, 39D
|- style="height:2em"
!2002
|- style="height:2em"
!2003
|rowspan=3 ((Party shading/Republican))|[[Jennette Bradley]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|[[Jim Petro]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|[[Betty Montgomery]] <small>(R)</small>
|rowspan=5 ((Party shading/Republican))|22R, 11D
|rowspan=2 ((Party shading/Republican))|62R, 37D
|rowspan=5 ((Party shading/Republican))|12R, 6D
|- style="height:2em"
!2004
|- style="height:2em"
!rowspan=2|2005
|rowspan=3 ((Party shading/Republican))|61R, 38D
|rowspan=3 ((Party shading/Republican))|6R, 1D
|- style="height:2em"
|rowspan=2 ((Party shading/Republican))|[[Bruce Johnson (Ohio politician)|Bruce Johnson]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|[[Jennette Bradley]] <small>(R)</small>
|- style="height:2em"
!2006
|- style="height:2em"
!2007
|rowspan=6 ((Party shading/Democratic))|[[Ted Strickland]] <small>(D)</small>
|rowspan=6 ((Party shading/Democratic))|[[Lee Fisher]] <small>(D)</small>
|rowspan=2 ((Party shading/Democratic))|[[Marc Dann]] <small>(D)</small>((efn|name=res|Resigned.))
|rowspan=6 ((Party shading/Democratic))|[[Jennifer Brunner]] <small>(D)</small>
|rowspan=4 ((Party shading/Democratic))|[[Richard Cordray]] <small>(D)</small>((efn|Resigned following election as state attorney general in November 2008 special election.))
|rowspan=6 ((Party shading/Republican))|[[Mary Taylor (Ohio politician)|Mary Taylor]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|21R, 12D
|rowspan=4 ((Party shading/Republican))|53R, 46D
|rowspan=5 ((Party shading/Republican))|7R
| rowspan=20 ((Party shading/Democratic/active)) |[[Sherrod Brown]] <small>(D)</small>
|rowspan=4 ((Party shading/Republican))|11R, 7D
|- style="height:2em"
!rowspan=3|2008
|rowspan=10 ((Party shading/Democratic))|[[Barack Obama]]/<br/>[[Joe Biden]] <small>(D)</small> ((Aye))
|- style="height:2em"
|((Party shading/Democratic))|Tom Winters <small>(D)</small>((efn|As deputy attorney general, acted as attorney general following Dann's resignation.))
|- style="height:2em"
|((Party shading/Democratic))|[[Nancy H. Rogers]] <small>(D)</small>((efn|name=app|Appointed to fill vacancy.))
|- style="height:2em"
!2009
|rowspan=2 ((Party shading/Democratic))|[[Richard Cordray]] <small>(D)</small>((efn|Elected in November 2008 special election.))
|rowspan=2 ((Party shading/Democratic))|[[Kevin Boyce]] <small>(D)</small>((efn|name=app))
|rowspan=2 ((Party shading/Democratic))|53D, 46R
|rowspan=2 ((Party shading/Democratic))|10D, 8R
|- style="height:2em"
![[2010 Ohio elections|2010]]
|rowspan=8 ((Party shading/Republican))|6R, 1D
|- style="height:2em"
!2011
|rowspan=8 ((Party shading/Republican))|[[John Kasich]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Mary Taylor (Ohio politician)|Mary Taylor]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Mike DeWine]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Jon Husted]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Josh Mandel]] <small>(R)</small>
|rowspan=8 ((Party shading/Republican))|[[Dave Yost]] <small>(R)</small>
|rowspan=6 ((Party shading/Republican))|23R, 10D
|rowspan=2 ((Party shading/Republican))|59R, 40D
| rowspan=12 ((Party shading/Republican)) |[[Rob Portman]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican))|13R, 5D
|- style="height:2em"
![[2012 Ohio elections|2012]]
|- style="height:2em"
!2013
|rowspan=2 ((Party shading/Republican))|60R, 39D
| rowspan=10 ((Party shading/Republican)) |12R, 4D
|- style="height:2em"
![[2014 Ohio elections|2014]]
|- style="height:2em"
!2015
|rowspan=2 ((Party shading/Republican))|65R, 34D
|- style="height:2em"
![[2016 Ohio elections|2016]]
| rowspan=4 ((Party shading/Republican)) |[[Donald Trump]]/<br/>[[Mike Pence]] <small>(R)</small> ((Aye))
|- style="height:2em"
!2017
| rowspan=4 ((Party shading/Republican)) |24R, 9D
|rowspan=2 ((Party shading/Republican))|66R, 33D
|- style="height:2em"
![[2018 Ohio elections|2018]]
| ((Party shading/Republican))|7R
|- style="height:2em"
!2019
| rowspan=6 ((Party shading/Republican/active)) |[[Mike DeWine]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican/active)) |[[Jon Husted]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican/active)) |[[Dave Yost]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican/active)) |[[Frank LaRose]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican/active)) |[[Robert Sprague]] <small>(R)</small>
| rowspan=6 ((Party shading/Republican/active)) |[[Keith Faber]] <small>(R)</small>
| rowspan=2 ((Party shading/Republican)) |61R, 38D
| rowspan=2 ((Party shading/Republican)) |5R, 2D
|- style="height:2em"
![[2020 Ohio elections|2020]]
| rowspan=4 ((Party shading/Republican/active)) |[[Donald Trump]]/<br/>[[Mike Pence]] <small>(R)</small> ((Nay))
|- style="height:2em"
!2021
|rowspan=2 ((Party shading/Republican)) |25R, 8D
|rowspan=2 ((Party shading/Republican)) |64R, 35D
|rowspan=4 ((Party shading/Republican/active)) |4R, 3D
|- style="height:2em"
![[2022 Ohio elections|2022]]
|-
!2023
|rowspan=2 ((Party shading/Republican/active)) |26R, 7D
|rowspan=2 ((Party shading/Republican/active)) |67R, 32D
|rowspan=2 ((Party shading/Republican/active)) |[[J. D. Vance]] <small>(R)</small>
|rowspan=2 ((Party shading/Republican/active)) |10R, 5D
|- style="height:2em"
![[2024 Ohio elections|2024]]
| ((TBD))
|- style="height:2em"
!rowspan=2|Year!![[List of governors of Ohio|Governor]]!![[List of lieutenant governors of Ohio|Lt. Governor]]!![[Ohio Attorney General|Attorney General]]!![[Ohio Secretary of State|Secretary of State]]!![[Ohio State Treasurer|Treasurer]]!![[Ohio State Auditor|Auditor]]!![[Ohio Senate|State Senate]]!![[Ohio House of Representatives|State House]]!!rowspan=2|[[Supreme Court of Ohio|Ohio<br/>Supreme<br/>Court]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class I)]]!![[List of United States senators from Ohio|U.S. Senator<br/>(Class III)]]!![[List of United States representatives from Ohio|U.S. House]]!! rowspan=2 |[[United States presidential election|Electoral votes]]
|- style="height:2em"
!colspan=6|Executive offices!!colspan=2|[[Ohio General Assembly|State Legislature]]!! colspan=3 |[[United States congressional delegations from Ohio|United States Congress]]
|}
((United States political party shading key))
((Notelist))

==See also==
*[[Elections in Ohio]]
*[[Ohio#Politics|Political demographics and history in Ohio]]
*[[Politics of Ohio]]

==References==
((reflist))
*((cite book|title=History of the Republican Party in Ohio |editor-first=Joseph P |editor-last=Smith |year=1898 |volume=I |publisher=the Lewis Publishing Company |location=Chicago |ref=smith1898| url=https://books.google.com/books?id=eaAFAAAAMAAJ&dq=ford&pg=PA40))

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

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

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