Larimer County, Colorado

Larimer County is one of the 64 counties in the U.S. state of Colorado. As of the 2010 census, the population was 299,630. The county seat and most populous city is Fort Collins. The county was named for William Larimer, Jr., the founder of Denver.
Larimer County was founded in 1861.
Geography.
The county has a total area of . It is at the northern end of the Front Range, at the edge of the Colorado Eastern Plains along the border with Wyoming.