- Lyonville
- Lees Corner
- Lake View Colony
- Le Compte Island (historical)
- Little Cedar Island (historical)
- Lodi
- Lafferty Island (historical)
- LaRoche Island (historical)
- Langford
- Lennox
- Lowry
- Lake City
- Lane
- Lebanon
- Long Lake
- Loomis
- Lucerne
- La Framboise Island
- La Plant
- LaBolt
- Lake Andes
- Lake Norden
- Lake Preston
- Lead
- Lemmon
- Leola
- Lesterville
- Letcher
- Lily
- Little Eagle