Ohio

1800-Part of the Northwest Territory.
1801-Clermont county only.
1803
1807
1811-Ashtabula county only.
1819-Shelby, Clermont, and Ashtabula only.
1823-Shelby and Ashtabula only.
1827-Allen, Miami and Shelby counties only.
1831-Fairfield, Portage and Shelby counties only.
1835-Ashtabula, Miami, Shelby and Portage counties only.
1839-Fairfield and Portage counties only.
1843-Mercer, Shelby and Ashtabula counties only.
1847-Auglaize, Mercer, Logan, Shelby and Perry counties only.

After 1850 many counties have quadrennial enumerations that still exist but are too numerous to list here.