Adams County, Ohio

Adams County, Ohio
Location within the U.S. state of Ohio
Coordinates: 38°50′N 83°29′W / 38.84°N 83.48°W / 38.84; -83.48
Country United States
State Ohio
FoundedJuly 10, 1797
Named afterJohn Adams
SeatWest Union
Largest villageWest Union
Area
 • Total
586 sq mi (1,520 km2)
 • Land584 sq mi (1,510 km2)
 • Water2.4 sq mi (6.2 km2)  0.4%
Population
 (2020)
 • Total
27,477
 • Density47/sq mi (18/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district2nd
Websiteadamscountyoh.gov

Adams County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 27,477. Its county seat and largest village is West Union. The county is named after John Adams, the second President of the United States.