List of United States Senators from Montana
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Montana was admitted to the Union on November 8, 1889.
Class 1
| Senator | Party | From | To |
|---|---|---|---|
| Wilbur F. Sanders | Republican | 1890 | 1893 |
| Vacant | 1893 | 1895 | |
| Lee Mantle | Republican | 1895 | 1899 |
| William A. Clark | Democrat | 1899 | 1900 |
| Paris Gibson | Democrat | 1901 | 1905 |
| Thomas H. Carter | Republican | 1905 | 1911 |
| Henry L. Myers | Democrat | 1911 | 1923 |
| Burton K. Wheeler | Democrat | 1923 | 1947 |
| Zales N. Ecton | Republican | 1947 | 1953 |
| Mike Mansfield | Democrat | 1953 | 1977 |
| John Melcher | Democrat | 1977 | 1989 |
| Conrad Burns | Republican | 1989 |
Class 2
| Senator | Party | From | To |
|---|---|---|---|
| Thomas Charles Power | Republican | 1890 | 1895 |
| Thomas H. Carter | Republican | 1895 | 1901 |
| William A. Clark | Democrat | 1901 | 1907 |
| Joseph M. Dixon | Republican | 1907 | 1913 |
| Thomas J. Walsh | Democrat | 1913 | 1933 |
| John E. Erickson | Democrat | 1933 | 1934 |
| James E. Murray | Democrat | 1934 | 1961 |
| Lee Metcalf | Democrat | 1961 | 1978 |
| Paul G. Hatfield | Democrat | 1978 | |
| Max Baucus | Democrat | 1978 |