North Dakota was admitted to the Union on November 2, 1889, and elects U.S. senators toclass 1 andclass 3. Its current senators in Congress are RepublicansJohn Hoeven (since 2011) andKevin Cramer (since 2019).Milton Young was North Dakota's longest-serving senator (1945–1981).
| Class 1Class 1 senators belong to the electoral cycle that has recently been contested in2006,2012,2018, and2024. The next election will be in2030. | C | Class 3Class 3 senators belong to the electoral cycle that has recently been contested in2004,2010,2016, and2022. The next election will be in2028. | ||||||||||
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| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
| Vacant | Nov 2, 1889 – Nov 25, 1889[a] | 1 | 51st | 1 | Nov 2, 1889 – Nov 25, 1889[a] | Vacant | ||||||
| 1 | Lyman R. Casey | Republican | Nov 25, 1889 – Mar 3, 1893 | Elected in 1889.Lost renomination. | Elected in 1889.Lost re-election. | Nov 25, 1889 – Mar 3, 1891 | Republican | Gilbert A. Pierce | 1 | |||
| 52nd | 2 | Elected in 1891. | Mar 4, 1891 – Mar 3, 1909 | Republican | Henry C. Hansbrough | 2 | ||||||
| 2 | William N. Roach | Democratic | Mar 4, 1893 – Mar 3, 1899 | Elected in 1893.[1] Lost re-election. | 2 | 53rd | ||||||
| 54th | ||||||||||||
| 55th | 3 | Re-elected in 1897. | ||||||||||
| 3 | Porter J. McCumber | Republican | Mar 4, 1899 – Mar 3, 1923 | Elected in 1899.[2] | 3 | 56th | ||||||
| 57th | ||||||||||||
| 58th | 4 | Re-elected in 1903.Lost renomination. | ||||||||||
| Re-elected in 1905.[3] | 4 | 59th | ||||||||||
| 60th | ||||||||||||
| 61st | 5 | Elected in 1909.Died. | Mar 4, 1909 – Oct 21, 1909 | Republican | Martin N. Johnson | 3 | ||||||
| Oct 21, 1909 – Nov 10, 1909 | Vacant | |||||||||||
| Appointed to continue Johnson's term.Resigned. | Nov 10, 1909 – Jan 31, 1910 | Democratic | Fountain L. Thompson | 4 | ||||||||
| Appointed to continue Johnson's term.Lost election to finish Johnson's term. | Feb 1, 1910 – Feb 1, 1911 | Democratic | William E. Purcell | 5 | ||||||||
| Elected in 1911 to finish Johnson's term, but didn't qualify until resigning from the U.S. House. | Feb 2, 1911 – Mar 3, 1921 | Republican | Asle Gronna | 6 | ||||||||
| Re-elected in 1911. | 5 | 62nd | ||||||||||
| 63rd | ||||||||||||
| 64th | 6 | Re-elected in 1914.Lost renomination. | ||||||||||
| Re-elected in 1916.Lost renomination. | 6 | 65th | ||||||||||
| 66th | ||||||||||||
| 67th | 7 | Elected in 1920.Died. | Mar 4, 1921 – Jun 22, 1925 | Republican (NPL) | Edwin F. Ladd | 7 | ||||||
| 4 | Lynn Frazier | Republican (NPL) | Mar 4, 1923 – Jan 3, 1941 | Elected in 1922. | 7 | 68th | ||||||
| 69th | ||||||||||||
| Jun 22, 1925 – Nov 14, 1925 | Vacant | |||||||||||
| Appointed to continue Ladd's term.Elected in 1926 to finish Ladd's term. | Nov 14, 1925 – Jan 3, 1945 | Nonpartisan League | Gerald Nye | 8 | ||||||||
| 70th | 8 | Re-elected in 1926. | Republican (NPL) | |||||||||
| Re-elected in 1928. | 8 | 71st | ||||||||||
| 72nd | ||||||||||||
| 73rd | 9 | Re-elected in 1932. | ||||||||||
| Re-elected in 1934.Lost renomination. | 9 | 74th | ||||||||||
| 75th | ||||||||||||
| 76th | 10 | Re-elected in 1938.Lost re-election. | Republican | |||||||||
| 5 | William Langer | Republican (NPL) | Jan 3, 1941 – Nov 8, 1959 | Elected in 1940. | 10 | 77th | ||||||
| 78th | ||||||||||||
| 79th | 11 | Elected in 1944.Died. | Jan 3, 1945 – Mar 3, 1945 | Democratic | John Moses | 9 | ||||||
| Mar 3, 1945 – Mar 12, 1945 | Vacant | |||||||||||
| Appointed to continue Moses's term.Elected in 1946 to finish Moses's term. | Mar 12, 1945 – Jan 3, 1981 | Republican | Milton Young | 10 | ||||||||
| Re-elected in 1946. | 11 | 80th | ||||||||||
| 81st | ||||||||||||
| 82nd | 12 | Re-elected in 1950. | ||||||||||
| Re-elected in 1952. | 12 | 83rd | ||||||||||
| 84th | ||||||||||||
| 85th | 13 | Re-elected in 1956. | ||||||||||
| Re-elected in 1958.Died. | 13 | 86th | ||||||||||
| Vacant | Nov 8, 1959 – Nov 19, 1959 | |||||||||||
| 6 | Norman Brunsdale | Republican | Nov 19, 1959 – Aug 7, 1960 | Appointed to continue Langer's term.Retired when successor elected. | ||||||||
| 7 | Quentin Burdick | Democratic –NPL | Aug 8, 1960 – Sep 8, 1992 | Elected to finish Langer's term. | ||||||||
| 87th | ||||||||||||
| 88th | 14 | Re-elected in 1962. | ||||||||||
| Re-elected in 1964. | 14 | 89th | ||||||||||
| 90th | ||||||||||||
| 91st | 15 | Re-elected in 1968. | ||||||||||
| Re-elected in 1970. | 15 | 92nd | ||||||||||
| 93rd | ||||||||||||
| 94th | 16 | Re-elected in 1974.Retired. | ||||||||||
| Re-elected in 1976. | 16 | 95th | ||||||||||
| 96th | ||||||||||||
| 97th | 17 | Elected in 1980.Lost re-election. | Jan 3, 1981 – Jan 3, 1987 | Republican | Mark Andrews | 11 | ||||||
| Re-elected in 1982. | 17 | 98th | ||||||||||
| 99th | ||||||||||||
| 100th | 18 | Elected in 1986.Retired, then resigned early when elected to the other Senate seat. | Jan 3, 1987 – Dec 14, 1992 | Democratic –NPL | Kent Conrad | 12 | ||||||
| Re-elected in 1988.Died. | 18 | 101st | ||||||||||
| 102nd | ||||||||||||
| Vacant | Sep 8, 1992 – Sep 12, 1992 | |||||||||||
| 8 | Jocelyn Burdick | Democratic –NPL | Sep 12, 1992 – Dec 14, 1992 | Appointed to continue her husband's term.Retired when successor elected. | ||||||||
| 9 | Kent Conrad | Democratic –NPL | Dec 14, 1992 – Jan 3, 2013 | Elected to finish Quentin Burdick's term. | Appointed to finish Conrad's term, having already been elected to the next term. | Dec 15, 1992 – Jan 3, 2011 | Democratic –NPL | Byron Dorgan | 13 | |||
| 103rd | 19 | Elected in 1992. | ||||||||||
| Re-elected in 1994. | 19 | 104th | ||||||||||
| 105th | ||||||||||||
| 106th | 20 | Re-elected in 1998. | ||||||||||
| Re-elected in 2000. | 20 | 107th | ||||||||||
| 108th | ||||||||||||
| 109th | 21 | Re-elected in 2004.Retired. | ||||||||||
| Re-elected in 2006.Retired. | 21 | 110th | ||||||||||
| 111th | ||||||||||||
| 112th | 22 | Elected in 2010. | Jan 3, 2011 – present | Republican | John Hoeven | 14 | ||||||
| 10 | Heidi Heitkamp | Democratic –NPL | Jan 3, 2013 – Jan 3, 2019 | Elected in 2012.Lost re-election. | 22 | 113th | ||||||
| 114th | ||||||||||||
| 115th | 23 | Re-elected in 2016. | ||||||||||
| 11 | Kevin Cramer | Republican | Jan 3, 2019 – present | Elected in 2018.[4] | 23 | 116th | ||||||
| 117th | ||||||||||||
| 118th | 24 | Re-elected in 2022. | ||||||||||
| Re-elected in 2024. | 24 | 119th | ||||||||||
| 120th | ||||||||||||
| 121st | 25 | To be determined in the 2028 election. | ||||||||||
| # | Senator | Party | Years in office | Electoral history | T | C | T | Electoral history | Years in office | Party | Senator | # |
| Class 1 | Class 3 | |||||||||||