Guernsey County, Ohio
Guernsey County: county in Ohio, United States
About
Guernsey County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 40,087 and a population density of 29 people per km². After 10 years in 2020 county had an estimated population of 38,779 inhabitants. Its county seat is Cambridge. The county was created 216 years ago in 1810.
Guernsey County is located in east-central Ohio. As of 2019, the population of Guernsey County was 39,706. The county seat is Cambridge, which had a population of 10,297 as of 2020.
Some key facts about Guernsey County:
- Guernsey County was formed in 1810 from portions of Muskingum and Belmont Counties. It was named after the Isle of Guernsey in the English Channel.
- The county's primary economic drivers include education, healthcare, manufacturing, and agriculture. Major employers include Cambridge City Schools, Guernsey Health Systems, and Detroit Diesel.
- Salt Fork State Park is located in Guernsey County. The largest state park in Ohio, Salt Fork attracts over 2 million visitors annually for camping, boating, and hiking.
- Guernsey County is home to several institutions of higher education, including Muskingum University and a branch campus of Zane State College.
- Natural gas and coal production have been major industries in Guernsey County since the mid-1800s.
- The National Road, also known as US 40, runs through Cambridge and Guernsey County. This was the first federally funded highway in the United States.
Guernsey County has a long history and several notable places to visit. The cities of Cambridge and Byesville serve as hubs for commerce and industry within the region.
County Snapshot
Guernsey County at a glance
Guernsey County currently has 16 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
16
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Ohio counties
88
Open related pagesLargest city
MarysvillePopulation 24,980
Top linked places
Quick Facts about Guernsey County
| Population | 38,779 (2020) |
| Country | United States of America |
| State | Ohio (United States) |
| Plate code | 30 |
| Area | 1368 km2 |
| Water as percent of area | 1.1% |
| Land as percent of area | 98.9% |
| Latitude & Longitude | 40.0521,-81.4943 |
| Named for | Guernsey |
| Altitude | 1,004 feet / 306 meters |
| Capital | Cambridge |
| Establishment | January 31, 1810 |
| Time Zone | America/New_York |
| Local time | 18:21:00 (17th April 2026) |
| Density | 28 Pop. per km² as of 2020 |
| Population growth | -3.37% (2010-2020) |
Geography
Guernsey County is located at 40°3'7"N 81°29'39"W (40.0520500, -81.4942600). It has 6 neighbors: Muskingum County, Noble County, Belmont County, Coshocton County, Harrison County and Tuscarawas County.
Guernsey County map
icon to open full mode. View satellite images
The largest city of Guernsey County is Marysville with a population of 24,980. Other cities include, Cambridge population 10,323, Mantua population 4,793, Byesville population 2,345 and Antrim population 1,203. See all Guernsey County cities & populated places.
Guernsey County Populated Places (more)
Cities, towns, neighborhoods & other populated places in Guernsey County.
| City Name | Population | Title |
|---|---|---|
| Marysville | 24,980 | City in Ohio, United States |
| Cambridge | 10,323 | City in Guernsey County, Ohio, United States |
| Mantua | 4,793 | Village in Portage County, Ohio, United States |
| Brady | 2,527 | Township in Williams County, Ohio |
| Gibson | 2,483 | Township in Mercer County, Ohio, United States |
| Byesville | 2,345 | City in Guernsey County, Ohio, United States of America |
| Antrim | 1,203 | City in Ohio, United States |
| Center | 1,188 | Township in Guernsey County, Ohio |
| Buffalo | 804 | City in Ohio County, Indiana, United States of America |
| Quaker City | 485 | Human settlement in Guernsey County, Ohio, United States of America |
| Senecaville | 447 | Human settlement in Guernsey County, Ohio, United States of America |
| Pleasant City | 422 | Human settlement in Guernsey County, Ohio, United States of America |
| Cumberland | 346 | Human settlement in Guernsey County, Ohio, United States of America |
| Lore City | 309 | Human settlement in Guernsey County, Ohio, United States of America |
| Old Washington | 267 | Village in Guernsey County, Ohio, United States |
| Helena | 208 | Human settlement in Sandusky County, Ohio, United States of America |
Official website of Guernsey County
Official Website- Cambridge
Demographics
According to census records, the population of Guernsey County decreased by 3.37% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 40,087 | - | census |
| 2011 | 39,910 | -0.44% | estimation process |
| 2012 | 39,876 | -0.09% | estimation process |
| 2013 | 39,706 | -0.43% | estimation process |
| 2014 | 39,690 | -0.04% | estimation process |
| 2015 | 39,392 | -0.76% | estimation process |
| 2016 | 39,211 | -0.46% | estimation process |
| 2017 | 39,066 | -0.37% | estimation process |
| 2018 | 39,011 | -0.14% | estimation process |
| 2019 | 38,875 | -0.35% | estimation process |
| 2020 | 38,779 | -0.25% | estimation process |
People born in Guernsey County (8)
People born in Guernsey County, including dermatologist John Addison Fordyce, politician Robert S. Carr, Ohio politician Walter D. Guilbert, .
More notable people
- Freeman T. Eagleson (Ohio Legislator) he was born in 04/10/1876
- Robert M. Cox (Medal of Honor recipient) he was born in 19/03/1845
- Erasmus Corwin Gilbreath he was born in 13/05/1840
- Emma Eliza Laughlin (United States botanist and botanical collector (1866—1962)) she was born in 27/08/1866
- Gertie Brown (American actress (1882-1934)) she was born in 23/08/1882
Ohio Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Franklin County | 1,324,624 | County in Massachusetts, United States |
| Cuyahoga County | 1,227,883 | County in Ohio, United States |
| Columbus | 884,356 | The fifteenth most populous city in the United States and the center of the Columbus metropolitan area. |
| Hamilton County | 817,985 | County in New York, United States |
| Summit County | 538,866 | County in northern Utah, United States |
| Montgomery County | 531,610 | County in Ohio, United States |
| Lucas County | 428,294 | County in Ohio, United States |
| Butler County | 385,648 | County in Ohio, United States of America |
| Cleveland | 378,589 | The second most populous city in Ohio and the center of the Cleveland metropolitan area. |
| Stark County | 369,772 | County in Ohio, United States |
| Lorain County | 312,172 | County in Ohio, United States |
| Cincinnati | 304,548 | The third most populous city in Ohio and the center of the Cincinnati metropolitan area. |
| Toledo | 271,455 | The fourth most populous city in Ohio and the center of the Toledo metropolitan area. |
| Warren County | 238,412 | County in New York, United States |
| Lake County | 229,569 | County in Ohio, United States |
| Mahoning County | 226,075 | County in Ohio, United States |