| Name | From | To |
| George Adam Geeting | 1772 | 1812 |
| Henry Hiestand and H.G. Spayth | 1812 | 1813 |
| Henry Spayth | 1813 | 1814 |
| John Snyder | 1814 | 1815 |
| ? | 1815 | 1818 |
| John Russell and Conrad Roth | 1818 | 1819 |
| Daniel Pfiefer | 1819 | 1820 |
| Wm. Brown and Conrad Weist | 1820 | 1821 |
| ? | 1821 | 1823 |
| John Brown | 1823 | 1824 |
| Henry Burtner and Jacob Erb | 1824 | 1825 |
| Gideon Smith | 1825 | 1826 |
| Gideon Smith and Wm. Brown | 1826 | 1827 |
| John Zahn and John Eckstine | 1827 | 1828 |
| John Zahn | 1828 | 1829 |
| Jacob Erb and J. Binger | 1829 | 1830 |
| John Kroch and Joseph Hershey | 1830 | 1831 |
| Jacob Glossbrenner and W.R. Rinehart | 1832 | 1832 |
| John Dorcas and Peter Wetzel | 1832 | 1833 |
| John Dorcas and W.R. Coursey | 1833 | 1834 |
| John Haney and W.R. Coursey | 1834 | 1835 |
| George Rimel and Jacob Baer | 1835 | 1836 |
| George Rimel and Martin L. Fries | 1836 | 1837 |
| William Knott | 1837 | 1838 |
| William Knott and Jacob Markwood | 1838 | 1839 |
| C.W. Zahn and Jacob Markwood | 1839 | 1840 |
| George Gilbert and John Ruebush | 1840 | 1841 |
| John Ruebush and David S. Spessard | 1841 | 1842 |
| David S. Spessard | 1842 | 1843 |
| Jacob Bachtel and John Richards | 1843 | 1845 |
| Jacob Bachtel and Richard Nihiser | 1845 | 1846 |
| J.E. Bowersox | 1846 | 1847 |
| J.E. Bowersox and J.W. Miles | 1847 | 1848 |
| J.W. Fulkerson and J.W. Miles | 1848 | 1849 |
| J.W. Fulkerson | 1849 | 1850 |
| W.R. Coursey and I.K. Statton | 1850 | 1851 |
| W.R. Coursey | 1851 | 1852 |
| H.B. Winton and David S. Spessard | 1852 | 1853 |
| H.B. Winton and John Perry | 1853 | 1854 |
| J.W. Miles and Z. Warner | 1854 | 1855 |
| J.W. Miles and A.Y. Graham | 1855 | 1856 |
| W.R. Coursey and C. Hammack | 1856 | 1857 |
| L.W. Matthews and D.D. Keedy | 1857 | 1858 |
| L.W. Matthews and Isaiah Balzell | 1858 | 1859 |
| L.W. Matthews and W.A. Jackson | 1859 | 1860 |
| I.K. Statton and W.A. Jackson | 1860 | 1861 |
| W.R. Coursey and I.K. Statton | 1863 | 1864 |
| G.W. Statton and J.D. Freed | 1864 | 1866 |
| G.W. Statton and A.M. Evers | 1866 | 1867 |
| A.M. Evers and J.L. Grimm | 1867 | 1868 |
| C.T. Stearn and Wm. O. Grimm | 1868 | 1869 |
| C.T. Stearn and G.H. Snapp | 1869 | 1870 |
| C.T. Stearn and W.O. Grimm | 1870 | 1871 |
| J.W. Hott and J.E. Whitzel | 1871 | 1872 |
| J.W. Hott and W.C. Grimm | 1872 | 1873 |
| H.A. Bovey | 1873 | 1876 |
| J.W. Kiracofe | 1876 | 1880 |
| W.O. Grimm | 1880 | 1881 |
| M.F. Keither | 1881 | 1883 |
| J.R. Ridenour | 1883 | 1885 |
| J.K. Nelson | 1885 | 1887 |
| S.H. Snell and W.B. Evers | 1887 | 1888 |
| L.O. Burtner | 1888 | 1892 |
| E.C.B. Castle | 1892 | 1895 |
| J.B. Chamberlain | 1895 | 1898 |
| S.L. Rice | 1898 | 1902 |
| J.P. Anthony | 1902 | 1916 |
| Paul E. Holdraft | 1916 | 1920 |
| W.M. Beattle | 1920 | 1922 |
| F.T. Kohler | 1922 | 1926 |
| R.A. Strasbaugh | 1926 | 1931 |
| J.B. Reed, Jr. | 1931 | 1937 |
| C.M. Sparrow | 1937 | 1940 |
| D. Homer Kendall | 1940 | 1947 |
| Charles R. Miller | 1947 | 1949 |
| Carl Varner | 1949 | 1953 |
| Ivan G. Naugle | 1953 | 1968 |
| Wayne H. Upton | 1968 | 1973 |
| Warren W. Watts | 1973 | 1977 |
| Theodore Clegg | 1977 | 1981 |
| Lewis Archer | 1981 | 1983 |
| N. Pittinger | 1983 | 1984 |
| Sheldon Reese | 1984 | 1988 |
| Joe Bradshaw | 1988 | 1991 |
| Gene Perry | 1991 | 1993 |
| Kenneth Fizer | 1993 | 2001 |
| Malcolm R. Stranathan | 2001 | 2008 |
| Patricia Watson | 2008 | 2010 |
| Jennifer Kokoski | 2010 | 2011 |
| Kathryn H. Letto | 2011 | 2012 |
| Robert G. Brennan | 2012 | 2014 |
| Elizabeth LeMaster | 2014 | 2015 |
| Albert G. Deal | 2015 | 2019 |
| Suzanne Jones | 2019 | Present |
