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Class 2 Seat
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Class 3 Seat
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Service
|
Senator | Party |
Service
|
Senator | Party | |
|
1890-1901
|
George L. Shoup | Republican |
1890-1891
|
William J. McConnell | Republican | |
| 1901-1907 | Fred T. Dubois | Democrat | 1891-1897 | Fred T. Dubois | Republican | |
| 1907-1940 | William E. Borah | Republican | 1897-1903 | Henry Heitfeld | Populist Democrat |
|
| 1940-1945 | John Thomas | Republican | 1903-1912 | Weldon B. Heyburn | Republican | |
| 1945-1946 | Charles Gossett | Democrat | 1912-1913 | Kirtland I. Perky | Democrat | |
| 1946-1949 | Henry C. Dworshak | Republican | 1913-1918 | James H. Brady | Republican | |
| 1949-1949 | Bert H. Miller | Democrat | 1918-1921 | John F. Nugent | Democrat | |
| 1949-1962 | Henry C. Dworshak | Republican | 1921-1928 | Frank R. Goodling | Republican | |
| 1962-1973 | Len B. Jordan | Republican | 1928-1933 | John Thomas | Republican | |
| 1973-1991 | James A. McClure | Republican | 1933-1939 | James P. Pope | Democrat | |
| 1991- | Larry E. Craig | Republican | 1939-1945 | D. Worth Clark | Democrat | |
| 1945-1951 | Glen H. Taylor | Democrat | ||||
| 1951-1957 | Herman Welker | Republican | ||||
| 1957-1981 | Frank F. Church | Democrat | ||||
| 1981-1993 | Steven D. Symms | Republican | ||||
| 1993-1999 | Dirk Kempthorne | Republican | ||||
| 1999- | Mike Crapo | Republican | ||||
| Idaho History | ||