Formed 6 Mar 1840, 261 square miles
Parent counties: Erie, Sandusky, Lucas
Evolution of county from date of formation until it assumed its final form
6 Mar 1840: Erected and organized
23 Mar 1840: Part attached to Sandusky
8 Mar 1845: Kelly's Island attached to Erie
1 Apr 1850: Part attached to Lucas
Federal Population schedules extant from 1820-1940. (1890 missing)
1820 Manufacturers (part of Sandusky); 1850 Agricultural; 1850 Industry; 1850 Mortality; 1860 Agricultural; 1860 Industry; 1860 Mortality; 1880 Agricultural; 1880 Industry
Allen, Bay, Benton, Carroll, Catawba Island, Clay, Danbury, Erie, Harris, Portage, Put-in-Bay, and Salem.
Archival District: Bowling Green State University, Center for Archival Collections, Jerome Library, Bowling Green Ohio.
Jana Broglin, CG, OGSF