Williams County
Also known as Williams County, Ohio, Williams County, OH
county in Ohio, United States
Key facts
- Country
- United States
- State
- Ohio
- Founded
- April 1, 1820 (created), February 2, 1824 (organized)
- Named after
- David Williams
- Seat
- Bryan
- Largest city
- Bryan
- Total
- 423.092 sq mi (1,095.80 km )
- Land
- 420.660 sq mi (1,089.50 km )
- Water
- 2.432 sq mi (6.30 km ) 0.57%
- Estimate 2025
- 36,549
- Density
- 86.894/sq mi (33.550/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
Article
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 36,549 in 2025. The county seat and the largest city is Bryan.
History