Williams County, Ohio

Williams County
Location within the U.S. state of Ohio
Ohio's location within the U.S.
Coordinates: 41°33′54″N 84°35′04″W / 41.564959°N 84.584324°W / 41.564959; -84.584324
Country United States
State Ohio
FoundedApril 1, 1820 (created)
February 2, 1824 (organized)
Named afterDavid Williams
SeatBryan
Largest cityBryan
Area
  Total
423.092 sq mi (1,095.80 km2)
  Land420.660 sq mi (1,089.50 km2)
  Water2.432 sq mi (6.30 km2)  0.57%
Population
 (2020)
  Total
37,102
  Estimate 
(2024)
36,554
  Density86.894/sq mi (33.550/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Area code419 and 567
Congressional district9th
Websitewilliamscountyoh.gov

Williams County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 37,102, and was estimated to be 36,554 in 2024. The county seat and the largest city is Bryan.