North Dakota was admitted to the Union on November 2, 1889, and elects U.S. senators to class 1 and class 3. Its current senators in Congress are Republicans John Hoeven (since 2011) and Kevin Cramer (since 2019). Milton Young was North Dakota's longest-serving senator (1945âÂÂ1981).
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 2, 1889 âÂÂ<br/>Nov 25, 1889 | | rowspan=3 | 1 | rowspan=2 | rowspan=2 | 1 | | nowrap | Nov 2, 1889 âÂÂ<br/>Nov 25, 1889 | colspan=3 | Vacant
|- ! rowspan=2 | 1 | rowspan=2 align=left | <br/>Lyman R. Casey | rowspan=2 | Republican | rowspan=2 nowrap | Nov 25, 1889 âÂÂ<br/>Mar 3, 1893 | rowspan=2 | Elected in 1889.Lost renomination. | Elected in 1889.Lost re-election. | nowrap | Nov 25, 1889 âÂÂ<br/>Mar 3, 1891 | | Republican | align=right | <br/>Gilbert A. Pierce ! 1
|- style="height:2em" | | rowspan=3 | 2 | rowspan=3 | Elected in 1891. | rowspan=9 nowrap | Mar 4, 1891 âÂÂ<br/>Mar 3, 1909 | rowspan=9 | Republican | rowspan=9 align=right | <br/>Henry C. Hansbrough ! rowspan=9 | 2
|- style="height:2em" ! rowspan=3 | 2 | rowspan=3 align=left | <br/>William N. Roach | rowspan=3 | Democratic | rowspan=3 nowrap | Mar 4, 1893 âÂÂ<br/>Mar 3, 1899 | rowspan=3 | Elected in 1893.
Lost re-election. | rowspan=3 | 2 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 3 | rowspan=3 | Re-elected in 1897.
|- style="height:2em" ! rowspan=16 | 3 | rowspan=16 align=left | <br/>Porter J. McCumber | rowspan=16 | Republican | rowspan=16 nowrap | Mar 4, 1899 âÂÂ<br/>Mar 3, 1923 | rowspan=3 | Elected in 1899. | rowspan=3 | 3 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 4 | rowspan=3 | Re-elected in 1903.Lost renomination.
|- style="height:2em" | rowspan=7 | Re-elected in 1905. | rowspan=7 | 4 |
|- style="height:2em" |
|- style="height:2em" | rowspan=5 | rowspan=7 | 5 | Elected in 1909.Died. | nowrap | Mar 4, 1909 âÂÂ<br/>Oct 21, 1909 | | Republican | align=right | <br/>Martin N. Johnson ! 3
|- style="height:2em" | | nowrap | Oct 21, 1909 âÂÂ<br/>Nov 10, 1909 | colspan=3 | Vacant
|- style="height:2em" | Appointed to continue Johnson's term.Resigned. | nowrap | Nov 10, 1909 âÂÂ<br/>Jan 31, 1910 | | Democratic | align=right | <br/>Fountain L. Thompson ! 4
|- style="height:2em" | Appointed to continue Johnson's term.Lost election to finish Johnson's term. | nowrap | Feb 1, 1910 âÂÂ<br/>Feb 1, 1911 | | Democratic | align=right | <br/>William E. Purcell ! 5
|- style="height:2em" | rowspan=3 | Elected in 1911 to finish Johnson's term, but didn't qualify until resigning from the U.S. House. | rowspan=6 nowrap | Feb 2, 1911 âÂÂ<br/>Mar 3, 1921 | rowspan=6 | Republican | rowspan=6 align=right | <br/>Asle Gronna ! rowspan=6 | 6
|- style="height:2em" | rowspan=3 | Re-elected in 1911. | rowspan=3 | 5 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 6 | rowspan=3 | Re-elected in 1914.Lost renomination.
|- style="height:2em" | rowspan=3 | Re-elected in 1916.Lost renomination. | rowspan=3 | 6 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=5 | 7 | rowspan=3 | Elected in 1920.Died. | rowspan=3 nowrap | Mar 4, 1921 âÂÂ<br/>Jun 22, 1925 | rowspan=3 | Republican (NPL) | rowspan=3 align=right | <br/>Edwin F. Ladd ! rowspan=3 | 7
|- style="height:2em" ! rowspan=11 | 4 | rowspan=11 align=left | <br/>Lynn Frazier | rowspan=11 | Republican<br/>(NPL) | rowspan=11 nowrap | Mar 4, 1923 âÂÂ<br/>Jan 3, 1941 | rowspan=5 | Elected in 1922. | rowspan=5 | 7 |
|- style="height:2em" | rowspan=3
|- style="height:2em" | | nowrap | Jun 22, 1925 âÂÂ<br/>Nov 14, 1925 | colspan=3 | Vacant
|- style="height:2em" | Appointed to continue Ladd's term.Elected in 1926 to finish Ladd's term. | rowspan=10 nowrap | Nov 14, 1925 âÂÂ<br/>Jan 3, 1945 | | Nonpartisan<br/>League | rowspan=10 align=right | <br/>Gerald Nye ! rowspan=10 | 8
|- style="height:2em" | | rowspan=3 | 8 | rowspan=3 | Re-elected in 1926. | rowspan=6 | Republican<br/>(NPL)
|- style="height:2em" | rowspan=3 | Re-elected in 1928. | rowspan=3 | 8 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 9 | rowspan=3 | Re-elected in 1932.
|- style="height:2em" | rowspan=3 | Re-elected in 1934.Lost renomination. | rowspan=3 | 9 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 10 | rowspan=3 | Re-elected in 1938.Lost re-election. | rowspan=3 | Republican
|- style="height:2em" ! rowspan=12 | 5 | rowspan=12 align=left | <br/>William Langer | rowspan=12 | Republican<br/>(NPL) | rowspan=12 nowrap | Jan 3, 1941 âÂÂ<br/>Nov 8, 1959 | rowspan=5 | Elected in 1940. | rowspan=5 | 10 |
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | rowspan=5 | 11 | Elected in 1944.Died. | nowrap | Jan 3, 1945 âÂÂ<br/>Mar 3, 1945 | | Democratic | align=right | <br/>John Moses ! 9
|- style="height:2em" | | nowrap | Mar 3, 1945 âÂÂ<br/>Mar 12, 1945 | colspan=3 | Vacant
|- style="height:2em" | rowspan=3 | Appointed to continue Moses's term.Elected in 1946 to finish Moses's term. | rowspan=21 nowrap | Mar 12, 1945 âÂÂ<br/>Jan 3, 1981 | rowspan=21 | Republican | rowspan=21 align=right | <br/>Milton Young ! rowspan=21 | 10
|- style="height:2em" | rowspan=3 | Re-elected in 1946. | rowspan=3 | 11 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 12 | rowspan=3 | Re-elected in 1950.
|- style="height:2em" | rowspan=3 | Re-elected in 1952. | rowspan=3 | 12 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=6 | 13 | rowspan=6 | Re-elected in 1956.
|- style="height:2em" | Re-elected in 1958.Died. | rowspan=6 | 13 | rowspan=4
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 8, 1959 âÂÂ<br/>Nov 19, 1959 |
|- style="height:2em" ! 6 | align=left | <br/>Norman Brunsdale | | Republican | nowrap | Nov 19, 1959 âÂÂ<br/>Aug 7, 1960 | Appointed to continue Langer's term.Retired when successor elected.
|- style="height:2em" ! rowspan=17 | 7 | rowspan=17 align=left | <br/>Quentin Burdick | rowspan=17 | Democratic<br/>âÂÂNPL | rowspan=17 nowrap | Aug 8, 1960 âÂÂ<br/>Sep 8, 1992 | rowspan=3 | Elected to finish Langer's term.
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 14 | rowspan=3 | Re-elected in 1962.
|- style="height:2em" | rowspan=3 | Re-elected in 1964. | rowspan=3 | 14 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 15 | rowspan=3 | Re-elected in 1968.
|- style="height:2em" | rowspan=3 | Re-elected in 1970. | rowspan=3 | 15 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 16 | rowspan=3 | Re-elected in 1974.Retired.
|- style="height:2em" | rowspan=3 | Re-elected in 1976. | rowspan=3 | 16 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 17 | rowspan=3 | Elected in 1980.Lost re-election. | rowspan=3 nowrap | Jan 3, 1981 âÂÂ<br/>Jan 3, 1987 | rowspan=3 | Republican | rowspan=3 align=right | <br/>Mark Andrews ! rowspan=3 | 11
|- style="height:2em" | rowspan=3 | Re-elected in 1982. | rowspan=3 | 17 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=6 | 18 | rowspan=5 | Elected in 1986.Retired, then resigned early when elected to the other Senate seat. | rowspan=5 nowrap | Jan 3, 1987 âÂÂ<br/>Dec 14, 1992 | rowspan=5 | Democratic<br/>âÂÂNPL | rowspan=5 align=right | <br/>Kent Conrad ! rowspan=5 | 12
|- style="height:2em" | rowspan=2 | Re-elected in 1988.Died. | rowspan=6 | 18 |
|- style="height:2em" | rowspan=4
|- style="height:2em" | colspan=3 | Vacant | nowrap | Sep 8, 1992 âÂÂ<br/>Sep 12, 1992 |
|- style="height:2em" ! 8 | align=left | <br/>Jocelyn Burdick | | Democratic<br/>âÂÂNPL | nowrap | Sep 12, 1992 âÂÂ<br/>Dec 14, 1992 | Appointed to continue her husband's term.Retired when successor elected.
|- style="height:2em" ! rowspan=11 | 9 | rowspan=11 align=left | <br/>Kent Conrad | rowspan=11 | Democratic<br/>âÂÂNPL | rowspan=11 nowrap | Dec 14, 1992 âÂÂ<br/>Jan 3, 2013 | rowspan=2 | Elected to finish Quentin Burdick's term. | Appointed to finish Conrad's term, having already been elected to the next term. | rowspan=10 nowrap | Dec 15, 1992 âÂÂ<br/>Jan 3, 2011 | rowspan=10 | Democratic<br/>âÂÂNPL | rowspan=10 align=right | <br/>Byron Dorgan ! rowspan=10 | 13
|- style="height:2em" | | rowspan=3 | 19 | rowspan=3 | Elected in 1992.
|- style="height:2em" | rowspan=3 | Re-elected in 1994. | rowspan=3 | 19 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 20 | rowspan=3 | Re-elected in 1998.
|- style="height:2em" | rowspan=3 | Re-elected in 2000. | rowspan=3 | 20 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 21 | rowspan=3 | Re-elected in 2004.Retired.
|- style="height:2em" | rowspan=3 | Re-elected in 2006.Retired. | rowspan=3 | 21 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 22 | rowspan=3 | Elected in 2010. | rowspan=9 nowrap | Jan 3, 2011 âÂÂ<br/>present | rowspan=9 | Republican | rowspan=9 align=right | <br/>John Hoeven ! rowspan=9 | 14
|- style="height:2em" ! rowspan=3 | 10 | rowspan=3 align=left | <br/>Heidi Heitkamp | rowspan=3 | Democratic<br/>âÂÂNPL | rowspan=3 nowrap | Jan 3, 2013 âÂÂ<br/>Jan 3, 2019 | rowspan=3 | Elected in 2012.Lost re-election. | rowspan=3 | 22 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 23 | rowspan=3 | Re-elected in 2016.
|- style="height:2em" ! rowspan=6 | 11 | rowspan=6 align=left | <br/>Kevin Cramer | rowspan=6 | Republican | rowspan=6 nowrap | Jan 3, 2019 âÂÂ<br/>present | rowspan=3 | Elected in 2018. | rowspan=3 | 23 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 24 | rowspan=3 | Re-elected in 2022.
|- style="height:2em" | rowspan=3| Re-elected in 2024. | rowspan=3| 24 |
|- style="height:2em" |
|- style="height:2em" | | 25 | colspan=5 | To be determined in the 2028 election.