Ohio

Admitted to the Union on March 1, 1803 as the 17th state.

  • No federal census taken in the Northwest Territory in 1790.
  • 1800 federal census lost for all counties except Washington.
  • 1810 federal census lost for all counties except Washington, and lost for Erie District, Michigan Territory.
  • 1820 federal census extant for all counties except Franklin and Wood, and extant for Monroe in Michigan Territory.
  • 1830 federal census extant for all counties, including Lenawee and Monroe in Michigan Territory.
  • 1840 – 1940 federal censuses extant for all counties except for 1890.
Adams Allen Ashland Ashtabula
Athens Auglaize Belmont Brown
Butler Carroll Champaign Clark
Clermont Clinton Columbiana Coshocton
Crawford Cuyahoga Darke Defiance
Delaware Erie Fairfield Fayette
Franklin Fulton Gallia Geauga
Greene Guernsey Hamilton Hancock
Hardin Harrison Henry Highland
Hocking Holmes Huron Jackson
Jefferson Knox Lake Lawrence
Licking Logan Lorain Lucas
Madison Mahoning Marion Medina
Meigs Mercer Miami Monroe
Montgomery Morgan Morrow Muskingum
Noble Ottawa Paulding Perry
Pickaway Pike Portage Preble
Putnam Richland Ross Sandusky
Scioto Seneca Shelby Stark
Summit Trumbull Tuscarawas Union
Van Wert Vinton Warren Washington
Wayne Williams Wood Wyandot