Current delegation

Tom Carper (D)

Chris Coons (D)

Below is a chronological listing of the United States senators from Delaware. U.S. senators were originally elected by the Delaware General Assembly for designated six-year terms beginning March 4. Frequently portions of the term would remain only upon a U.S. senator's death or resignation. From 1914 and the enforcement of the Seventeenth Amendment to the United States Constitution, adopted in 1913 but rejected by the General Assembly that year and not ratified until July 1, 2010, officeholders were popularly elected on the first Tuesday after November 1; starting 1935, the beginning of their term is January 3. Delaware's current U.S. senators are Democrats Tom Carper (serving since January 3, 2001) and Chris Coons (serving since November 15, 2010). Joe Biden is Delaware's longest serving senator (1973–2009).

List of senators

Class 1 Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012 and 2018. The next election will be in 2024.						C	Class 2 Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2010 (special election), 2014 and 2020. The next election will be in 2026.
#	Senator	Party	Dates in office	Electoral history	T		T	Electoral history	Dates in office	Party	Senator	#
1	George Read	Pro- Admin.	Mar 4, 1789 – Sep 18, 1793	Elected in 1788.	1	1st	1	Elected in 1788.	Mar 4, 1789 – Mar 3, 1793	Anti- Admin.	Richard Bassett	1
				Re-elected in 1790. Resigned to become Chief Justice of Delaware.	2	2nd				Pro- Admin.
						3rd	2	Elected in 1793. Resigned.	Mar 4, 1793 – Jan 19, 1798	Pro-Admin.	John Vining	2
Vacant			Sep 18, 1793 – Feb 7, 1795
2	Henry Latimer	Pro- Admin.	Feb 7, 1795 – Feb 28, 1801	Elected in 1795 to finish Read's term.
		Federalist				4th				Federalist
				Re-elected in 1797. Resigned.	3	5th
								Elected in 1798 to finish Vining's term. Died.	Jan 19, 1798 – Aug 11, 1798	Federalist	Joshua Clayton	3
									Aug 11, 1798 – Jan 17, 1799	Vacant
								Elected in 1799 to finish Clayton's term.	Jan 17, 1799 – Nov 6, 1804	Federalist	William H. Wells	4
						6th	3	Re-elected in 1799. Resigned.
3	Samuel White	Federalist	Feb 28, 1801 – Nov 4, 1809	Appointed to finish Latimer's term.
						7th
				Re-elected in 1803.[1]	4	8th
									Nov 6, 1804 – Nov 13, 1804	Vacant
								Elected in 1804 to finish Wells's term.	Nov 13, 1804 – Mar 3, 1813	Federalist	James A. Bayard	5
						9th	4	Re-elected in 1805.
						10th
				Re-elected in 1809.[2] Died.	5	11th
Vacant			Nov 4, 1809 – Jan 12, 1810
4	Outerbridge Horsey	Federalist	Jan 12, 1810 – Mar 3, 1821	Elected in 1810 to finish White's term.
						12th	5	Re-elected in 1811. Resigned.
						13th			Mar 3, 1813 – May 21, 1813	Vacant
								Elected in 1813 to finish Bayard's term. Retired.	May 21, 1813 – Mar 3, 1817	Federalist	William H. Wells	6
				Re-elected in 1815.[3] Retired.	6	14th
						15th	6	Elected in 1817. Legislature failed to elect.	Mar 4, 1817 – Mar 3, 1823	Federalist	Nicholas Van Dyke	7
						16th
Vacant			Mar 4, 1821 – Jan 23, 1822		7	17th
5	Caesar A. Rodney	Democratic- Republican	Jan 24, 1822 – Jan 29, 1823	Elected late to finish vacant term. Resigned to become U.S. Minister to the United Provinces of the River Plate.
Vacant			Jan 29, 1823 – Jan 8, 1824
						18th	7		Mar 4, 1823 – Jan 8, 1824	Vacant
								Re-elected late. Died.	Jan 8, 1824 – May 21, 1826	Federalist	Nicholas Van Dyke
6	Thomas Clayton	Federalist	Jan 8, 1824 – Mar 3, 1827	Elected in 1824 to finish Rodney's term.
		National Republican				19th				National Republican
									May 21, 1826 – Nov 8, 1826	Vacant
								Appointed to continue Van Dyke's term. Retired.	Nov 8, 1826 – Jan 12, 1827	National Republican	Daniel Rodney	8
								Elected in 1827 to finish Van Dyke's term. Retired.	Jan 12, 1827 – Mar 3, 1829	Jacksonian	Henry M. Ridgely	9
7	Louis McLane	Jacksonian	Mar 4, 1827 – Apr 16, 1829	Elected in 1827. Resigned to become U.S. Envoy Extraordinary and Minister Plenipotentiary to England.	8	20th
						21st	8	Elected in 1829.	Mar 4, 1829 – Dec 29, 1836	National Republican	John M. Clayton	10
Vacant			Apr 16, 1829 – Jan 7, 1830
8	Arnold Naudain	National Republican	Jan 7, 1830 – Jun 16, 1836	Elected in 1830 to finish McLane's term.
						22nd
				Re-elected in 1832. Resigned.	9	23rd
						24th	9	Re-elected in 1835. Resigned.
9	Richard H. Bayard	National Republican	Jun 17, 1836 – Sep 19, 1839	Elected in 1836 to finish Naudain's term.
									Dec 29, 1836 – Jan 9, 1837	Vacant
								Elected in 1837 to finish his cousin's term.	Jan 9, 1837 – Mar 3, 1847	National Republican	Thomas Clayton	11
		Whig				25th				Whig
				Re-elected during the 1838/39 cycle. Resigned to become Chief Justice of Delaware.	10	26th
	Vacant		Sep 19, 1839 – Jan 11, 1841
	Richard H. Bayard	Whig	Jan 12, 1841 – Mar 3, 1845	Elected in 1841 to finish his own term. Retired.
						27th	10	Re-elected in 1841.
						28th
10	John M. Clayton	Whig	Mar 4, 1845 – Feb 23, 1849	Elected in 1845. Resigned to become U.S. Secretary of State.	11	29th
						30th	11	Elected in 1846 or 1847. Retired.	Mar 4, 1847 – Mar 3, 1853	Whig	Presley Spruance	12
11	John Wales	Whig	Feb 23, 1849 – Mar 3, 1851	Elected in 1849 to finish Clayton's term. Lost re-election.
						31st
12	James A. Bayard Jr.	Democratic	Mar 4, 1851 – Jan 29, 1864	Elected in 1851.	12	32nd
						33rd	12	Elected in 1853. Died.	Mar 4, 1853 – Nov 9, 1856	Whig	John M. Clayton	13
						34th
									Nov 9, 1856 – Nov 19, 1856	Vacant
								Appointed to continue Clayton's term. Declined nomination to finish Clayton's term.	Nov 19, 1856 – Jan 14, 1857	Whig	Joseph P. Comegys	14
								Elected in 1857 to finish Clayton's term. Lost re-election.	Jan 14, 1857 – Mar 3, 1859	Democratic	Martin W. Bates	15
				Re-elected in 1857.	13	35th
						36th	13	Elected in 1858.	Mar 4, 1859 – Mar 3, 1871	Democratic	Willard Saulsbury Sr.	16
						37th
				Re-elected in 1863. Resigned.	14	38th
13	George R. Riddle	Democratic	Jan 29, 1864 – Mar 29, 1867	Elected in 1864 to finish Bayard's term. Died.
						39th	14	Re-elected in 1864. Lost re-election.
						40th
Vacant			Mar 29, 1867 – Apr 5, 1867
14	James A. Bayard Jr.	Democratic	Apr 5, 1867 – Mar 3, 1869	Appointed to continue his own term. Elected in 1869 to finish his own term.[4] Retired.
15	Thomas F. Bayard	Democratic	Mar 4, 1869 – Mar 6, 1885	Elected in 1869.	15	41st
						42nd	15	Elected in 1870.	Mar 4, 1871 – Mar 3, 1889	Democratic	Eli Saulsbury	17
						43rd
				Re-elected in 1875.	16	44th
						45th	16	Re-elected in 1876.
						46th
				Re-elected in 1881. Resigned to become U.S. Secretary of State.	17	47th
						48th	17	Re-elected in 1883. Lost re-election.
						49th
Vacant			Mar 6, 1885 – Mar 18, 1885
16	George Gray	Democratic	Mar 18, 1885 – Mar 3, 1899	Elected in 1885 to finish Bayard's term.
				Re-elected in 1887.	18	50th
						51st	18	Election year unknown. Lost re-election.	Mar 4, 1889 – Mar 3, 1895	Republican	Anthony Higgins	18
						52nd
				Re-elected in 1893. Lost re-election.	19	53rd
						54th	19	Legislature failed to elect.	Mar 4, 1895 – Jan 19, 1897	Vacant
								Elected in 1897 to finish vacant term. Lost re-election.	Jan 19, 1897 – Mar 3, 1901	Democratic	Richard R. Kenney	19
						55th
Vacant			Mar 4, 1899 – Mar 1, 1903	Legislature failed to elect.	20	56th
						57th	20	Legislature failed to elect.	Mar 4, 1901 – Mar 2, 1903	Vacant
17	L. Heisler Ball	Republican	Mar 2, 1903 – Mar 3, 1905	Elected in 1903 to finish vacant term.				Elected in 1903 to finish vacant term. Retired.	Mar 2, 1903 – Mar 3, 1907	Republican	J. Frank Allee	20
						58th
Vacant			Mar 4, 1905 – Jun 12, 1906	Legislature failed to elect.	21	59th
18	Henry A. du Pont	Republican	Jun 13, 1906 – Mar 3, 1917	Elected in 1906 to finish vacant term.
						60th	21	Elected in 1907.[5] Retired.	Mar 4, 1907 – Mar 3, 1913	Republican	Harry A. Richardson	21
						61st
				Re-elected in 1911. Lost re-election.	22	62nd
						63rd	22	Elected in 1913. Lost re-election.	Mar 4, 1913 – Mar 3, 1919	Democratic	Willard Saulsbury Jr.	22
						64th
19	Josiah O. Wolcott	Democratic	Mar 4, 1917 – Jul 2, 1921	Elected in 1916. Resigned to become Chancellor of Delaware.	23	65th
						66th	23	Elected in 1918. Lost renomination.	Mar 4, 1919 – Mar 3, 1925	Republican	L. Heisler Ball	23
						67th
20	T. Coleman du Pont	Republican	Jul 7, 1921 – Nov 6, 1922	Appointed to finish Wolcott's term. Lost election to finish Wolcott's term.
21	Thomas F. Bayard Jr.	Democratic	Nov 7, 1922 – Mar 3, 1929	Elected in 1922 to finish Wolcott's term.
				Elected in 1922. Lost re-election.	24	68th
						69th	24	Elected in 1924. Resigned.	Mar 4, 1925 – Dec 8, 1928	Republican	T. Coleman du Pont	24
						70th
									Dec 8, 1928 – Dec 10, 1928	Vacant
								Appointed to finish du Pont's term. Elected in 1930 to finish du Pont's term.	Dec 10, 1928 – Jan 3, 1937	Republican	Daniel O. Hastings	25
22	John G. Townsend Jr.	Republican	Mar 4, 1929 – Jan 3, 1941	Elected in 1928.	25	71st
						72nd	25	Elected in 1930. Lost re-election.
						73rd
				Re-elected in 1934. Lost re-election.	26	74th
						75th	26	Elected in 1936. Lost renomination.	Jan 3, 1937 – Jan 3, 1943	Democratic	James H. Hughes	26
						76th
23	James M. Tunnell	Democratic	Jan 3, 1941 – Jan 3, 1947	Elected in 1940. Lost re-election.	27	77th
						78th	27	Elected in 1942. Lost re-election.	Jan 3, 1943 – Jan 3, 1949	Republican	C. Douglass Buck	27
						79th
24	John J. Williams	Republican	Jan 3, 1947 – Dec 31, 1970	Elected in 1946.	28	80th
						81st	28	Elected in 1948.	Jan 3, 1949 – Jan 3, 1961	Democratic	J. Allen Frear Jr.	28
						82nd
				Re-elected in 1952.	29	83rd
						84th	29	Re-elected in 1954. Lost re-election.
						85th
				Re-elected in 1958.	30	86th
						87th	30	Elected in 1960.	Jan 3, 1961 – Jan 3, 1973	Republican	J. Caleb Boggs	29
						88th
				Re-elected in 1964. Retired and resigned to give his successor preferential seniority.	31	89th
						90th	31	Re-elected in 1966. Lost re-election.
						91st
25	William Roth	Republican	Jan 1, 1971 – Jan 3, 2001	Appointed to finish Williams's term, having been elected to the next term.
				Elected in 1970.	32	92nd
						93rd	32	Elected in 1972.	Jan 3, 1973 – Jan 15, 2009	Democratic	Joe Biden	30
						94th
				Re-elected in 1976.	33	95th
						96th	33	Re-elected in 1978.
						97th
				Re-elected in 1982.	34	98th
						99th	34	Re-elected in 1984.
						100th
				Re-elected in 1988.	35	101st
						102nd	35	Re-elected in 1990.
						103rd
				Re-elected in 1994. Lost re-election.	36	104th
						105th	36	Re-elected in 1996.
						106th
26	Tom Carper	Democratic	Jan 3, 2001 – present	Elected in 2000.	37	107th
						108th	37	Re-elected in 2002.
						109th
				Re-elected in 2006.	38	110th
						111th	38	Re-elected in 2008. Resigned to become U.S. Vice President.
								Appointed to continue Biden's term. Retired when his successor was elected.	Jan 15, 2009[6] – Nov 15, 2010	Democratic	Ted Kaufman	31
								Elected in 2010 to finish Biden's term.	Nov 15, 2010 – present	Democratic	Chris Coons	32
						112th
				Re-elected in 2012.	39	113th
						114th	39	Re-elected in 2014.
						115th
				Re-elected in 2018. Retiring at end of term.	40	116th
						117th	40	Re-elected in 2020.
						118th
To be determined in the 2024 election.					41	119th
						120th	41	To be determined in the 2026 election.
#	Senator	Party	Years in office	Electoral history	T	C	T	Electoral history	Years in office	Party	Senator	#
Class 1							Class 2