- Farisita
- Fairplay
- Fort Boettcher
- Federal Heights
- Firestone
- Flagler
- Fort Carson
- Fort Collins
- Fort Garland
- Fort Lupton
- Fort Morgan
- Foxfield
- Ferndale
- Foxton
- Franktown
- Fruita
- Falfa
- Florida
- Fall River Estates Subdivision
- Fairview
- Frost
- Fayette
- Fearnowville
- Fort Reynolds
- Fishhook Island
- Fairview
- Farmers
- Fosston