From History of Clarion County, unknown compiler, published circa 1976.
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| Year | Sheriff |
|---|---|
| 1840 | James Hasson |
| 1843 | Daniel Delo |
| 1846 | Seth Clover |
| 1849 | John Klingensmith |
| 1852 | Daniel B. Hamm |
| 1855 | J. S. Turney |
| 1858 | James C. Galbreath |
| 1861 | S. Scott Jones |
| 1864 | C. J. Rhea |
| 1867 | Henry H. Neely |
| 1870 | Samuel Johnson |
| 1873 | A. H. Beck |
| 1876 | B. B. Dunkle |
| 1879 | W. F. Collner |
| 1882 | I. M. Shannon |
| 1885 | C. A. Wheelock (term expired Jan 1889) |
| 1889 | John Mong |
| 1891 | Jesse Kiehl |
| 1910 | W. S. Smathers S. W. Best retired |
| 1922 | Robert Holden Showers |
| 1930 | W. Harold Laughlin |
| 1938 | Mervin O. McKinley |
| 1942 | W. O. "Bus" Mong |
| 1946 | A. R. Harold |
| 1949-1953 | W. O. "Bus" Mong |
| 1958-1966 | Eugene Daugherty |
| 1970-1974 | James L. Cumberland (resigned 03 Jan 1975) |
| 1975 | Bernard C. Lahr (appointed 26 Feb 1975) |