Cass County, Iowa

Cass County, Iowa
Location within the U.S. state of Iowa
Coordinates: 41°19′46″N 94°55′45″W / 41.329444444444°N 94.929166666667°W / 41.329444444444; -94.929166666667
Country United States
State Iowa
Founded1851
Named afterLewis Cass
SeatAtlantic
Largest cityAtlantic
Area
 • Total
565 sq mi (1,460 km2)
 • Land564 sq mi (1,460 km2)
 • Water0.7 sq mi (1.8 km2)  0.1%
Population
 (2020)
 • Total
13,127
 • Estimate 
(2024)
13,127
 • Density23.3/sq mi (8.99/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.casscountyia.gov
  • Iowa county number 15

Cass County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 13,127. Its county seat is Atlantic. It was named to honor Lewis Cass, who was the 1848 Democratic nominee for president.