Your Guide to Marion County, Ohio
Looking for trusted businesses, services and local resources in Marion County, Ohio? FindItOhio.com helps residents and visitors discover local companies, professionals and community information across Marion County, including Marion, the county seat.
Quick answer: Marion County is one of Ohio’s 88 counties. Its county seat is Marion, it was established in 1820, and it has an estimated 65,115 residents as of 2025.
At a Glance
- County seat: Marion
- Established: Apr 1, 1820
- Formed from: Delaware County
- Named for: General Francis Marion (1732 to 1795), lieutenant colonel in the Continental Army and later brigadier general in the American Revolutionary War
- Estimated population (2025): 65,115
- Total area: 403.84 sq mi
- FIPS code: 39101
About Marion County
Marion County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,359. Its county seat is Marion. The county was erected by the state of Ohio on February 20, 1820 and later reorganized in 1824. It is named for General Francis “Swamp Fox” Marion, a South Carolinian officer in the Revolutionary War. Marion County comprises the Marion, OH Micropolitan Statistical Area, which is also included in the Columbus Marion Zanesville, OH Combined Statistical Area.
Cities and Villages in Marion County
Cities
Marion â€
Villages
Caledonia, Green Camp, LaRue, Morral, New Bloomington, Prospect, Waldo
Find Local Businesses in Marion County
Browse the FindItOhio.com business directory to find restaurants, contractors, professional services, shops and more serving Marion 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 Marion 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 Marion County, Ohio?
Marion is the county seat of Marion County, Ohio.
When was Marion County established?
Marion County was established on Apr 1, 1820. It was formed from Delaware County.
Who or what is Marion County named for?
Marion County is named for General Francis Marion (1732 to 1795), lieutenant colonel in the Continental Army and later brigadier general in the American Revolutionary War.
How many people live in Marion County, Ohio?
Marion County has an estimated population of 65,115 as of 2025.
What cities are in Marion County, Ohio?
Cities in Marion County include Marion †.
Where can I find local businesses in Marion County?
Search the FindItOhio.com business directory to find local businesses and services in Marion County, Ohio.
How do I list my Marion 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 Marion County, Ohio, available under the Creative Commons Attribution ShareAlike 4.0 license.