Sedgwick County, Colorado

Sedgwick County
Sedgwick County Courthouse, Julesburg
Location within the U.S. state of Colorado
Colorado's location within the U.S.
Coordinates: 40°53′N 102°21′W / 40.88°N 102.35°W / 40.88; -102.35
Country United States
State Colorado
FoundedApril 9, 1889
Named afterJohn Sedgwick
SeatJulesburg
Largest townJulesburg
Area
  Total
549 sq mi (1,420 km2)
  Land548 sq mi (1,420 km2)
  Water1.4 sq mi (4 km2)  0.2%
Population
 (2020)
  Total
2,404
  Estimate 
(2024)
2,257
  Density4.4/sq mi (1.7/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district4th
Websitesedgwickcounty.colorado.gov

Sedgwick County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 2,404. The county seat is Julesburg. The county was named for Fort Sedgwick, a military post along the Platte Trail, which was named for General John Sedgwick. It is located at the state border with Nebraska.