Formed 12 Feb 1820, 421 square miles
Parent county: Defiance
Evolution of county from date of formation until it assumed its final form
1 Apr 1820: Erected and attached to Wood until organized
2 Feb 1824: Organized. Paulding, Henry, and Putnam attached temporarily until organized
3 Jan 1834: Diminished by organization of Putnam
26 Dec 1834: Diminished by organization of Henry
18 Mar 1839: Diminished by organization of Paulding
7 Apr 1845: Diminished by formation of Defiance
1 Apr 1850: Diminished by formation of Fulton
Two county seats have been in Williams County. The first located in Defiance (Defiance County) from 1820-1841. The second, the current county seat, Bryan in 1841.
Federal Population schedules extant from 1830-1940. (1890 missing)
1850 Agricultural; 1850 Industry; 1850 Mortality; 1860 Industry; 1860 Mortality; 1870 Agricultural; 1870 Industry; 1880 Agricultural; 1880 Industry
Brady, Bridgewater, Center, Florence, Jefferson, Madison, Mill Creek, Northwest, Pulaski, St. Joseph, Springfield, and Superior.
Archival District: Bowling Green State University, Center for Archival Collections, Jerome Library, Bowling Green Ohio.
Jana Broglin, CG, OGSF