| # | Office Holder | Party | Tenure |
|---|---|---|---|
| 1 | Robert Winslow Jones | Democratic | Nov 9, 1966 to May 17, 1967 |
| Vacant | May 17, 1967 to Nov 6, 1968 | ||
| 2 | Robert Lewis Sheaffer | Republican | Nov 6, 1968 to Nov 8, 1972 |
| 3 | Paul Merton Stanley | Democratic | Nov 8, 1972 to Nov 8, 1978 |
| 4 | James Robert Butcher | Republican | Nov 8, 1978 to Nov 5, 1986 |
| 5 | Steven Randall Johnson | Republican | Nov 5, 1986 to Nov 6, 2002 |
| 6 | Jeff Drozda | Republican | Nov 6, 2002 to Apr 14, 2008 |
| Vacant | Apr 14, 2008 to Apr 26, 2008 | ||
| 7 | James R. Buck | Republican | Apr 26, 2008 to Present |