Glen Haven is an unincorporated community and a U.S. Post Office in Larimer County, Colorado, United States. The Glen Haven Post Office has the ZIP Code 80532.

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.