- La Jara
- La Junta
- La Junta Gardens
- La Salle
- La Veta
- Lafayette
- Laird
- Lake City
- Lakeside
- Lakeside
- Lakewood
- Lamar
- Laporte
- Larkspur
- Las Animas
- Lazy Acres
- Leadville
- Leadville North
- Lewis
- Leyner
- Limon
- Lincoln Park
- Littleton
- Lochbuie
- Log Lane Village
- Loghill Village
- Loma
- Lone Tree
- Longmont
- Louisville
- Louviers
- Loveland
- Loveland Ski Area
- Lynn
- Lyons
