Fremont County, Iowa

Fremont County, Iowa
Fremont County Courthouse
Location within the U.S. state of Iowa
Coordinates: 40°44′38″N 95°36′31″W / 40.743888888889°N 95.608611111111°W / 40.743888888889; -95.608611111111
Country United States
State Iowa
Founded1847
Named afterJohn C. Fremont
SeatSidney
Largest citySidney
Area
 • Total
517 sq mi (1,340 km2)
 • Land511 sq mi (1,320 km2)
 • Water5.5 sq mi (14 km2)  1.1%
Population
 (2020)
 • Total
6,605
 • Estimate 
(2024)
6,494
 • Density12.9/sq mi (4.99/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.fremontcountyia.gov
  • Iowa county number 36

Fremont County is a county located in the U.S. state of Iowa. As of the 2020 census the population was 6,605, making it the state's seventh-least populous county. The county seat and the largest city is Sidney. The county was formed in 1847 and named for the military officer John C. Frémont.