| # | Office Holder | Party | Tenure |
|---|---|---|---|
| 1 | Robert Eugene Peterson | Democratic | Nov 9, 1966 to Nov 6, 1968 |
| 2 | Leo Owen Sullivan | Republican | Nov 6, 1968 to Nov 8, 1972 |
| 3 | Clarence Richard Kelley | Republican | Nov 8, 1972 to Nov 3, 1976 |
| 4 | Vernon Richard Miller | Republican | Nov 3, 1976 to Nov 9, 1988 |
| 5 | Betty N. Lawson | Democratic | Nov 9, 1988 to Nov 4, 1992 |
| 6 | Kent J. Adams | Republican | Nov 4, 1992 to Nov 3, 2004 |
| 7 | Ryan Mishler | Republican | Nov 3, 2004 to Present |