Appointed by Governor to 7-year terms (Chapter 224, Acts of 1836, confirmed by Chapter 160, Acts of 1837):
1841-1849 Jacob Shower (D)
1849-1851 John B. Boyle
Elected by Voters to 6-year terms (Constitution of 1864, Art. IV, sec. 29):
1865-1867 William A. McKellip
Elected by Voters to 6-year terms (Constitution of 1867, Art. IV, sec. 25):
1867-1873 John B. Boyle
1873-1885 Frank T. Shaw
1885-1891 William M. Martin
1891-1897 Benjamin F. Crouse
1897-1903 James H. Billingslea
1903-1909 David P. Smelser
1909-1915 Oscar D. Gilbert
1915-1921 Edward O. Cash
1921-1926 Edwin M. Mellor, Jr.
Elected by Voters to 4-year terms (Constitution of 1867, Art. XVII, added by Chapter 227, Acts of 1922, ratified Nov. 7, 1922):
1926-1936 Edwin M. Mellor, Jr.
1936-1942 Levi D. Maus (R)
1942-1958 Erman A. Shoemaker (R)
Elected by Voters to 4-year terms (Constitution of 1867, Art. IV, sec. 25, amended by Chapter 99, Acts of 1956, ratified Nov. 6, 1956):
1958-1962 George Bucher John
1962-1978 Charles C. Conaway
1978-2006 Larry W. Shipley (R)
2006-2018 Donald B. Sealing II (R)
2018- Heather DeWees (R)
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