Hardin County, Ohio

Hardin County, Ohio
Location within the U.S. state of Ohio
Coordinates: 40°40′N 83°40′W / 40.66°N 83.66°W / 40.66; -83.66
Country United States
State Ohio
FoundedMarch 1, 1833
Named afterJohn Hardin
SeatKenton
Largest cityKenton
Area
 • Total
471 sq mi (1,220 km2)
 • Land470 sq mi (1,200 km2)
 • Water0.2 sq mi (0.52 km2)  0.1%
Population
 (2020)
 • Total
30,696
 • Estimate 
(2024)
30,402
 • Density64.7/sq mi (25.0/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district4th
Websitehardincountyohio.gov

Hardin County is a county located in the west central portion of the U.S. state of Ohio. As of the 2020 census, the population was 30,696. Its county seat and largest city is Kenton. The county was created in 1820 and later organized in 1833. It is named for John Hardin, an officer in the American Revolution.