Clay County, Iowa

Clay County, Iowa
Location within the U.S. state of Iowa
Coordinates: 43°04′51″N 95°08′58″W / 43.080833333333°N 95.149444444444°W / 43.080833333333; -95.149444444444
Country United States
State Iowa
Founded1851
Named afterHenry Clay Jr.
SeatSpencer
Largest citySpencer
Area
 • Total
573 sq mi (1,480 km2)
 • Land567 sq mi (1,470 km2)
 • Water5.4 sq mi (14 km2)  0.9%
Population
 (2020)
 • Total
16,384
 • Estimate 
(2024)
16,474
 • Density28.9/sq mi (11.2/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district4th
Websiteclaycounty.iowa.gov
  • Iowa county number 21

Clay County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 16,384. Its county seat is Spencer. Its name is in honor of Henry Clay Jr., a colonel who died in action in the Mexican–American War, and son of Henry Clay, famous American statesman from Kentucky. Clay County comprises the Spencer, IA Micropolitan Statistical Area. Clay County holds the annual Clay County Fair. The first newspaper in Clay County was the Peterson Patriot which started publication in 1880.