Idaho's Senators 1890 - Today
| First Position Senator | Party | Term |
| George L. Shoup | Republican | 1890-1901 |
| Fred T. Dubois | Democrat | 1901-1907 |
| William E. Borah | Republican | 1907-1940 |
| John Thomas | Republican | 1940-1945 |
| Charles C. Gossett | Democrat | 1945-1946 |
| Henry C. Dworshak | Republican | 1946-1949 |
| Bert H. Miller | Democrat | 1949-1949 |
| Henry C. Dworshak | Republican | 1949-1962 |
| Len B. Jordan | Republican | 1962-1973 |
| James A. McClure | Republican | 1973-1991 |
| Larry E. Craig | Republican | 1991- |
| Second Position Senator | Party | Term |
| William J. McConnell | Republican | 1890-1891 |
| Fred T. Dubios | Republican | 1891-1897 |
| Henry Heitfeld | Progressive | 1897-1903 |
| Weldon B. Heyburn | Republican | 1903-1912 |
| Kirkland I. Perky | Democrat | 1912-1913 |
| James H. Brady | Republican | 1913-1918 |
| John F. Nugent | Democrat | 1918-1921 |
| Frank R. Gooding | Republican | 1921-1928 |
| John Thomas | Republican | 1928-1933 |
| James P. Pope | Democrat | 1933-1939 |
| D. Worth Clark | Democrat | 1939-1945 |
| Glen H. Taylor | Democrat | 1945-1951 |
| Herman Welker | Republican | 1951-1957 |
| Frank Church | Democrat | 1957-1981 |
| Steven D. Symms | Republican | 1981-1993 |
| Dirk Kempthorne | Republican | 1993-1999 |
| Michael D. Crapo | Republican | 1999- |


