Your Guide to Williams County, Ohio
Looking for trusted businesses, services and local resources in Williams County, Ohio? FindItOhio.com helps residents and visitors discover local companies, professionals and community information across Williams County, including Bryan, the county seat.
Quick answer: Williams County is one of Ohio’s 88 counties. Its county seat is Bryan, it was established in 1820, and it has an estimated 36,549 residents as of 2025.
At a Glance
- County seat: Bryan
- Established: Apr 1, 1820
- Formed from: Darke County
- Named for: David Williams (1754 to 1831), captor of spy John André during the Revolutionary War
- Estimated population (2025): 36,549
- Total area: 421.74 sq mi
- FIPS code: 39171
About Williams County
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 of Williams County
The county was created on April 1, 1820 and later organized on February 2, 1824. It is named for David Williams, one of the captors of John André in the American Revolutionary War.
Cities and Villages in Williams County
Cities
Bryan â€
Villages
Blakeslee, Edgerton, Edon, Holiday City, Montpelier, Pioneer, Stryker, West Unity
Find Local Businesses in Williams County
Browse the FindItOhio.com business directory to find restaurants, contractors, professional services, shops and more serving Williams County. Own a business here? Add your free business listing so local customers can find you.
Background Checks, Process Serving and Private Investigations
Residents and employers in Williams County can get BCI and FBI LiveScan fingerprinting, FD-258 fingerprint cards, process serving and licensed private investigations from these Ohio providers:
- Ohio Security & Investigations, Youngstown: licensed private investigations and fingerprinting. Call (888) 341-6960 or visit ohioinvestigators.com.
- 10-8 Protective Services, Columbus: investigations, fingerprinting and process serving. Call (800) 949-8521 or visit 10-8protectiveservices.com.
Frequently Asked Questions
What is the county seat of Williams County, Ohio?
Bryan is the county seat of Williams County, Ohio.
When was Williams County established?
Williams County was established on Apr 1, 1820. It was formed from Darke County.
Who or what is Williams County named for?
Williams County is named for David Williams (1754 to 1831), captor of spy John André during the Revolutionary War.
How many people live in Williams County, Ohio?
Williams County has an estimated population of 36,549 as of 2025.
What cities are in Williams County, Ohio?
Cities in Williams County include Bryan †.
Where can I find local businesses in Williams County?
Search the FindItOhio.com business directory to find local businesses and services in Williams County, Ohio.
How do I list my Williams County business on FindItOhio.com?
Visit the free business listing page on FindItOhio.com and submit your business name, address, phone number and website.
Looking for another county? Explore all 88 Ohio counties on FindItOhio.com.
County background adapted from the Wikipedia article Williams County, Ohio, available under the Creative Commons Attribution ShareAlike 4.0 license.