| Census Years for the State of Ohio | |
| Federal Census Years | ||||
| 1820 | 1830 | 1840 | 1850 | 1860 |
| 1870 | 1880 | 1900 | 1910 | 1920 |
| State Census Years | ||||
| 1800- Pt NW Terr |
1801- Clermont |
1803 | 1807 | 1811- Ashtabula |
| 1819- Shlb/Clrmnt/Ash |
1823- Shlb/Ash |
1827- Alln/Miami/Shlb |
1831- Frfld/Prtg/Shlb |
1835- Ash/Mm/Shlb/Prtg |
| 1839- Frfld/Prtg |
1843- Mrcr/Shlb/Ash |
1847- Aglz/Mrcr/Lgn/Shlb/Prry |
Post-1850 quad. enum. |
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