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