Harrison County, Ohio

Harrison County, Ohio
Location within the U.S. state of Ohio
Coordinates: 40°17′N 81°05′W / 40.29°N 81.09°W / 40.29; -81.09
Country United States
State Ohio
FoundedFebruary 1, 1813
Named afterWilliam Henry Harrison
SeatCadiz
Largest villageCadiz
Area
 • Total
411 sq mi (1,060 km2)
 • Land402 sq mi (1,040 km2)
 • Water8.4 sq mi (22 km2)  2.1%
Population
 (2020)
 • Total
14,483
 • Estimate 
(2024)
14,042
 • Density35/sq mi (14/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district6th
Websitewww.harrisoncountyohio.gov

Harrison County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 14,483, making it the fifth-least populous county in Ohio. Its county seat and largest village is Cadiz. The county is named for General William Henry Harrison, who was later President of the United States.