| CONGRESS | NAME OF SENATOR | TERM BEGAN | TERM ENDED | COMMENTS |
|---|---|---|---|---|
| Class 1 | ||||
| 62nd - 76th | Henry Fountain Ashurst (D) | Mar. 27, 1912 | Jan. 3, 1941 | |
| 77th - 82nd | Ernest W. McFarland (D) | Jan. 3, 1941 | Jan. 3, 1953 | |
| 83rd - 88th | Barry M. Goldwater (R) | Jan. 3, 1953 | Jan. 3, 1965 | |
| 89th - 94th | Paul J. Fannin (R) | Jan. 3, 1965 | Jan. 3, 1977 | |
| 95th - 103rd | Dennis W. DeConcini (D) | Jan. 3, 1977 | Jan. 3, 1995 | |
| 104th - 112th | Jon L. Kyl (R) | Jan. 3, 1995 | Jan. 3, 2013 | |
| 113th - | Jeff Flake (R) | Jan. 3, 2013 | Present | |
| Class 3 | ||||
| 62nd - 66th | Marcus A. Smith (D) | Mar. 27, 1912 | Mar. 3, 1921 | |
| 67th - 69th | Ralph H. Cameron (R) | Mar. 4, 1921 | Mar. 3, 1927 | |
| 70th - 90th | Carl T. Hayden (D) | Mar. 4, 1927 | Jan. 3, 1969 | |
| 91st - 99th | Barry M. Goldwater (R) | Jan. 3, 1969 | Jan. 3, 1987 | |
| 100th - | John S. McCain III (R) | Jan. 3, 1987 | Present | |
