- Leadville Junction
- Leadville North
- La Boca
- La Plata
- La Posta
- Loma Linda
- Little Dam
- Loveland Heights
- Lynn
- Limón
- La Jara
- La Veta
- Lakewood
- Leroy
- Logan
- Lucky Seven Summer Homes
- Leadville
- Loyd
- Lebanon
- Littleton
- Lochbuie
- Log Lane Village
- Loghill Village
- Longmont
- Loveland
- Lujane
- Lamb
- Lodi
- La Junta Gardens
- La Junta Village