Your Guide to Clark County, Ohio
Looking for trusted businesses, services and local resources in Clark County, Ohio? FindItOhio.com helps residents and visitors discover local companies, professionals and community information across Clark County, including Springfield, the county seat.
Quick answer: Clark County is one of Ohio’s 88 counties. Its county seat is Springfield, it was established in 1818, and it has an estimated 135,340 residents as of 2025.
At a Glance
- County seat: Springfield
- Established: Mar 1, 1818
- Formed from: Champaign, Madison, and Greene Counties
- Named for: General George Rogers Clark (1752 to 1818), defeated the Shawnee Indians in a battle near the Springfield area
- Estimated population (2025): 135,340
- Total area: 399.86 sq mi
- FIPS code: 39023
About Clark County
Clark County is a county located in the west central portion of the U.S. state of Ohio. As of the 2020 census, the population was 136,001. Its county seat and largest city is Springfield. The county was created on March 1, 1818, and was named for General George Rogers Clark, a hero of the American Revolution. Clark County comprises the Springfield, OH Metropolitan Statistical Area, which is also included in the Dayton Springfield Sidney OH Combined Statistical Area.
Cities and Villages in Clark County
Cities
New Carlisle, Springfield â€
Villages
Catawba, Clifton, Donnelsville, Enon, North Hampton, South Charleston, South Vienna, Tremont City
Find Local Businesses in Clark County
Browse the FindItOhio.com business directory to find restaurants, contractors, professional services, shops and more serving Clark 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 Clark 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 Clark County, Ohio?
Springfield is the county seat of Clark County, Ohio.
When was Clark County established?
Clark County was established on Mar 1, 1818. It was formed from Champaign, Madison, and Greene Counties.
Who or what is Clark County named for?
Clark County is named for General George Rogers Clark (1752 to 1818), defeated the Shawnee Indians in a battle near the Springfield area.
How many people live in Clark County, Ohio?
Clark County has an estimated population of 135,340 as of 2025.
What cities are in Clark County, Ohio?
Cities in Clark County include New Carlisle, Springfield †.
Where can I find local businesses in Clark County?
Search the FindItOhio.com business directory to find local businesses and services in Clark County, Ohio.
How do I list my Clark 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 Clark County, Ohio, available under the Creative Commons Attribution ShareAlike 4.0 license.