From History of Clarion County, unknown compiler, published circa 1976.
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| Year | Commissioners |
|---|---|
| 1840 | Robert Potter Lindsay C. Pritner George Hamilton (all provisional; appointed by Governor) |
| 1840 | George L. Benn Jacob Miller Gideon Richardson (elected) |
| 1841 | Joseph Young |
| 1842 | James Kerr |
| 1843 | William Curll |
| 1844 | Hugh Maguire |
| 1845 | Henry Sloan |
| 1846 | William Henry |
| 1847 | Stephen D. Burns |
| 1848 | Amos W. Owens |
| 1849 | Daniel Bostaph |
| 1850 | James T. Burns Peter B. Simpson |
| 1851 | Peter B. Simpson |
| 1852 | Daniel Mercer |
| 1853 | James Rankin |
| 1854 | Samuel M. Zink |
| 1855 | William Divins |
| 1856 | Daniel Mercer |
| 1857 | Christian Seigworth |
| 1858 | Benjamin Miller |
| 1859 | Samuel Kiefer |
| 1860 | John McLain |
| 1861 | John F. McGinnis |
| 1862 | William W. Rankin |
| 1863 | William Frampton |
| 1864 | Adam Black |
| 1865 | Isaac Neely |
| 1866 | E. W. Haines |
| 1867 | W. A. Henry |
| 1868 | James T. Burns |
| 1869 | Valentine Shick |
| 1870 | Isaac Mong |
| 1871 | John Stewart, Jr. |
| 1872 | Christian Breneman |
| 1873 | Levi Shaner |
| 1874 | George T. Henry |
| 1875 | Samuel D. Sloan J. T. Burns Valentine Phipps |
| 1878 | James B. Lawson John Keatly John J. Wilson |
| 1881 | John Keatly Aaron Kline Johnson Wilson |
| 1884 | David Heffron S. A. Bell Emanuel Over |
| 1889 | S. A. Bell Joshua McCall Jesse F. Gardner |
| 1890 | David Mohney Uriah Best |
| 1893 | W. H. Kerr Cyrus Neely James Russell |
| 1896 | J. C. Shields Paul Eisenman Robert Hayes |
| 1899 | J. A. Summerville J. S. Saxton W. S. Fleming |
| 1906 | W. S. M. Fleming D. B. Mercer S. X. McClellan Henry Hufnagel (chief clerk) |
| 1909 | A. R. Cyphert D. B. Mercer George M. Myers |
| 1912 | J. K. Pierce Peter Zacherl D. C. Hindman Reed Cyphert (chief clerk) |
| 1916 | Frank McCall Jacob Stahlman B. F. Frill |
| 1920 | W. G. Platt Thomas P. Howard B. F. Frill |
| 1924 | Harvey J. Mitchell E. O. Lerch T. P. Howard |
| 1928 | T. P. Howard H. J. Mitchell E. O. Lerch |
| 1932 | E. O. Lerch C. G. Burns H. J. Mitchell |
| 1933 | Homer B. George DeForest Bowman T. G. McFarland |
| 1936 | T. D. Stewart Dan Goff Chester Braden Fred McDonald (chief clerk) |
| 1938 | William A. Walter (replaced Chester Braden, who died) |
| 1944 | William A. Walter Harry S. McCullan George M. Seigworth |
| 1948 | William A. Walter M. O. McKinley George M. Seigworth |
| 1952 | M. O. McKinley Arthur Hannold George M. Seigworth |
| 1956 | Donald J. Myers Arthur Hannold James V. Laughlin |
| 1958 | George M. Seigworth |
| 1960 | Charles W. Wilhelm Cuvier Kline Frank Shofestall |
| 1964 | Charles W. Wilhelm Arthur A. Stewart (died 4 Oct 1964) Cuvier Kline Brady H. Weaver (appointed) |
| 1968 | Brady H. Weaver Cuvier Kline Frank Stahlman |
| 1972 | Kenneth B. Campbell Brady H. Weaver Robert S. Thompson |
| 1976 | Thomas M. Armagost Fred C. McIlhattan James W. Hunt |
