Your Guide to Clinton County, Ohio
Looking for trusted businesses, services and local resources in Clinton County, Ohio? FindItOhio.com helps residents and visitors discover local companies, professionals and community information across Clinton County, including Wilmington, the county seat.
Quick answer: Clinton County is one of Ohio’s 88 counties. Its county seat is Wilmington, it was established in 1810, and it has an estimated 42,301 residents as of 2025.
At a Glance
- County seat: Wilmington
- Established: Mar 1, 1810
- Formed from: Highland and Warren Counties
- Named for: George Clinton (1739 to 1812), vice president when the county was organized
- Estimated population (2025): 42,301
- Total area: 410.88 sq mi
- FIPS code: 39027
About Clinton County
Clinton County is a county located in the U.S. state of Ohio. As of the 2020 United States census, the population was 42,018. Its county seat and largest city is Wilmington. The county is named for former U.S. Vice President George Clinton. Clinton County comprises the Wilmington, Ohio Micropolitan Statistical Area, which is also included in the Cincinnati Wilmington Maysville, OH KY IN Combined Statistical Area.
History of Clinton County
Clinton County was formed on February 19, 1810, from sections of Highland County and Warren County, with the law creating the county taking effect on March 1 of that year. It was named after George Clinton, a soldier, politician, Governor of New York, and Vice President of the United States.
Cities and Villages in Clinton County
Cities
Wilmington â€
Villages
Blanchester, Clarksville, Lynchburg, Martinsville, Midland, New Vienna, Port William, Sabina
Find Local Businesses in Clinton County
Browse the FindItOhio.com business directory to find restaurants, contractors, professional services, shops and more serving Clinton 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 Clinton 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 Clinton County, Ohio?
Wilmington is the county seat of Clinton County, Ohio.
When was Clinton County established?
Clinton County was established on Mar 1, 1810. It was formed from Highland and Warren Counties.
Who or what is Clinton County named for?
Clinton County is named for George Clinton (1739 to 1812), vice president when the county was organized.
How many people live in Clinton County, Ohio?
Clinton County has an estimated population of 42,301 as of 2025.
What cities are in Clinton County, Ohio?
Cities in Clinton County include Wilmington †.
Where can I find local businesses in Clinton County?
Search the FindItOhio.com business directory to find local businesses and services in Clinton County, Ohio.
How do I list my Clinton 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 Clinton County, Ohio, available under the Creative Commons Attribution ShareAlike 4.0 license.