Larimer County, Colorado

Larimer County
Location within the U.S. state of Colorado
Colorado's location within the U.S.
Coordinates: 40°39′N 105°28′W / 40.65°N 105.46°W / 40.65; -105.46
Country United States
State Colorado
FoundedNovember 1, 1861
Named afterWilliam Larimer, Jr.
SeatFort Collins
Largest cityFort Collins
Area
  Total
2,634 sq mi (6,820 km2)
  Land2,596 sq mi (6,720 km2)
  Water38 sq mi (100 km2)  1.4%
Population
 (2020)
  Total
359,066
  Estimate 
(2024)
374,574
  Density140/sq mi (53/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional districts2nd, 4th, 8th
Websitewww.larimer.org

Larimer County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 359,066. The county seat and most populous city is Fort Collins. The county was named for William Larimer, Jr., the founder of Denver. Larimer County comprises the Fort Collins, CO Metropolitan Statistical Area. The county is located at the northern end of the Front Range, at the edge of the Colorado Eastern Plains along the border with Wyoming.