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.
AdFind Out the Market Value of Any Property and Past Sale Prices. Enter Any Address. See Prior Ownership History, Sales Records, Property Deed & So Much More. Conduct a Search