Your Guide to Guernsey County, Ohio
Looking for trusted businesses, services and local resources in Guernsey County, Ohio? FindItOhio.com helps residents and visitors discover local companies, professionals and community information across Guernsey County, including Cambridge, the county seat.
Quick answer: Guernsey County is one of Ohio’s 88 counties. Its county seat is Cambridge, it was established in 1810, and it has an estimated 38,379 residents as of 2025.
At a Glance
- County seat: Cambridge
- Established: Mar 1, 1810
- Formed from: Belmont and Muskingum Counties
- Named for: Island of Guernsey, from where most of the settlers originated
- Estimated population (2025): 38,379
- Total area: 521.90 sq mi
- FIPS code: 39059
About Guernsey County
Guernsey County is a county located in the east central portion of the U.S. state of Ohio. As of the 2020 census, the population was 38,438. Its county seat and largest city is Cambridge. It is named from the Isle of Guernsey in the English Channel, from which many of the county’s early settlers emigrated.
Guernsey County comprises the Cambridge, OH Micropolitan Statistical Area, which is also included in the Columbus Marion Zanesville, OH Combined Statistical Area.
History of Guernsey County
Guernsey County, located in the Appalachian foothills, was first formed and organized on March 10, 1810, from portions of Muskingum and Belmont counties by the Ohio Legislature. The first county commissioners were sworn in on April 23, 1810. It lost some land during the formation of neighboring counties until it reached its present boundaries in 1851, when Buffalo, Beaver, Olive, and Seneca townships were gained by Noble County. After a dispute whether the county seat should be Cambridge or Washington, it was established in Cambridge after two individuals proposed to donate the land and furnish the public buildings if built there.
Cities and Villages in Guernsey County
Cities
Cambridge â€
Villages
Byesville, Cumberland, Fairview, Lore City, Old Washington, Pleasant City, Quaker City, Senecaville
Find Local Businesses in Guernsey County
Browse the FindItOhio.com business directory to find restaurants, contractors, professional services, shops and more serving Guernsey 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 Guernsey 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 Guernsey County, Ohio?
Cambridge is the county seat of Guernsey County, Ohio.
When was Guernsey County established?
Guernsey County was established on Mar 1, 1810. It was formed from Belmont and Muskingum Counties.
Who or what is Guernsey County named for?
Guernsey County is named for Island of Guernsey, from where most of the settlers originated.
How many people live in Guernsey County, Ohio?
Guernsey County has an estimated population of 38,379 as of 2025.
What cities are in Guernsey County, Ohio?
Cities in Guernsey County include Cambridge †.
Where can I find local businesses in Guernsey County?
Search the FindItOhio.com business directory to find local businesses and services in Guernsey County, Ohio.
How do I list my Guernsey 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 Guernsey County, Ohio, available under the Creative Commons Attribution ShareAlike 4.0 license.