| Name | Term of Service |
| 1. John Byington | May 20, 1863 to May 17, 1865 |
| 2. James White | May 17, 1865 to May 14, 1867 |
| 3. J. N. Andrews | May 14, 1867 to May 18, 1869 |
| 4. James White | May 18, 1869 to December 29, 1871 |
| 5. George I Butler | December 29, 1871 to August 10, 1874 |
| 6. James While | August 10, 1874 to October 6, 1880 |
| 7. George I Butler | October 6, 1880 to October 17, 1888 |
| 8. O. A. Olsen | October 17, 1888 to February 19, 1897 |
| 9. C. A Irwin | February 19, 1897 to April 2, 1901 |
| 10. A. C. Daniells | April 2, 1901 to May 11, 1922 |
| 11. W. A. Spicer | May 11, 1922 to May 28, 1930 |
| 12. C. H. Watson | May 28, 1930 to May 26, 1936 |
| 13. J. L. McElhany | May 26, 1936 to July 10, 1950 |
| 14. W. H. Branson | July 10, 1950 to May 24, 1954 |
| 15. R. R. Figuhr | May 24, 1954 to June 16, 1966 |
| 16. Robert H. Pierson | June 16, 1966 to January 3, 1979 |
| 17. Neal C. Wilson | January 3, 1979 to---- |
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