Clayton County, Iowa

Clayton County, Iowa
Winter scene near Elkader
Location within the U.S. state of Iowa
Coordinates: 42°50′28″N 91°19′25″W / 42.840985°N 91.323576°W / 42.840985; -91.323576
Country United States
State Iowa
FoundedDecember 21, 1837
Named afterJohn M. Clayton
SeatElkader
Largest cityGuttenberg
Area
 • Total
792.631 sq mi (2,052.90 km2)
 • Land778.464 sq mi (2,016.21 km2)
 • Water14.167 sq mi (36.69 km2)  1.79%
Population
 (2020)
 • Total
17,043
 • Estimate 
(2024)
16,931
 • Density21.893/sq mi (8.4530/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code563
Congressional district1st
Websiteclaytoncountyia.gov
  • Iowa county number 22

Clayton County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 17,043, and was estimated to be 16,931 in 2024. The county seat is Elkader and the largest city is Guttenberg.