Formed 19 Feb 1810, 410 square miles
Parent counties: Highland and Warren
Evolution of county from date of formation until it assumed its final form
1 Mar 1810: Erected and organized
4 Feb 1813: Part of Highland attached
1 Mar 1815: Part of Highland attached. Part of Warren attached.
Federal Population schedules extant from 1820-1940. (1890 missing for all except Wayne Township.)
1820 Manufacturers; 1850 Agricultural; 1850 Industry; 1860 Mortality; 1870 Agricultural; 1870 Industry; 1880 Agricultural; 1880 Mortality
Adams, Chester, Clark, Green, Jefferson, Liberty, Marion, Richland, Union, Vernon, Washington, Wayne, and Wilson.
Archival District: University of Cincinnati, Archives & Rare Books, Blegen Library
Jana Broglin, OGSF