- La Framboise Island
- La Plant
- LaBolt
- Lacy
- LaDelle
- Ladner
- Lafferty Island (historical)
- Lake Andes
- Lake City
- Lake Norden
- Lake Preston
- Lake View Colony
- Lakeport
- Lakeview
- Lakota Homes
- Lane
- Langford
- Lantry
- LaPlant
- LaRoche Island (historical)
- Le Compte Island (historical)
- Lead
- Lebanon
- Lees Corner
- Lemmon
- Lennox
- Leola
- Lesterville
- Letcher
- Lily