- Libbey Island
- Libby Corner
- Libby Hill
- Libby Island
- Libby Islands
- Libbytown
- Liberty
- Liberty Corner
- Ligonia
- Lille
- Lily Bay
- Lily Island
- Lime Island
- Limerick
- Limerick Mills
- Limestone
- Limington
- Lincoln
- Lincoln Center
- Lincoln Mills
- Lincolnville
- Lincolnville Center
- Lindsay Island
- Linekin
- Lines Island
- Linneus
- Lisbon
- Lisbon Center
- Lisbon Falls
- Litchfield Corners