Trumbull County is a county located in the state of Ohio, United States. As of the 2000 census, the population was 225,116. Its county seat is Warren. The county is named for Jonathan Trumbull, Governor of Connecticut, who once owned the land in this region. Originally Trumbull County consisted of the entire area of the Connecticut Western Reserve before being divided into smaller counties. According to the U.S. Census Bureau, the county has a total area of 635 square miles (1,644 km²).616 square miles (1,597 km²) of it is land and 18 square miles (47 km²) of it (2.87%) is water. It is approximately a square with sides of 25 miles; it is the only square county in Ohio.

Cities

Cortland Girard Hubbard

Newton Falls Niles

Warren Youngstown

Villages

Lordstown McDonald Orangeville

West Farmington Yankee Lake

Townships

Bazetta Bloomfield Braceville Bristol Brookfield Champion

Farmington Fowler Greene Gustavus Hartford Howland

Hubbard Johnston Kinsman Liberty Mecca Mesopotamia

Newton Southington Vernon Vienna Warren Weathersfield

Defunct township

• Lordstown Township

Census-designated places

Bolindale Brookfield Center Champion Heights Churchill Hilltop

Howland Center Leavittsburg Maplewood Park Masury

Mineral Ridge South Canal Vienna Center West Hill

Other communities

Bristolville Burghill Center of the World

Farmdale Fowler Hartford

Kinsman North Bloomfield Southington

Mickinley Memorial - Niles, Ohio