Formed 12 Feb 1820 (404 square miles)
Parent counties: Seneca, Sandusky, Marion
Evolution of county from date of formation until it assumed its final form
1 Apr 1820: Erected and attached to Delaware
17 Feb 1824: Part attached to Seneca until organization
1 Apr 1824: Part attached to Marion until organization
1 Apr 1826: Organized
3 Feb 1845: Diminished by formation of Wyandot. Part of Richland and Marion attached
1 Mar 1848: Diminished by formation of Morrow
Federal Population schedules extant from 1820-1940. (1890 missing)
1820 Manufacturers (part of Delaware and Richland); 1850 Agricultural; 1850 Industry; 1860 Mortality; 1870 Agricultural; 1870 Industry; 1880 Agricultural; 1880 Industry; 1880 Mortlity
Auburn, Bucyrus, Chatfield, Cranberry, Dallas, Holmes, Jackson, Jefferson, Liberty, Lykens, Polk, Sandusky, Texas, Tod, Vernon, and Whetstone.
Archival District: Bowling Green State University, Center for Archival Collections, Jerome Library, Bowling Green Ohio.
Jana Broglin, OGSF