- Larrabee
- Lary Island
- Lasell Island
- Lavertue
- Lawry
- Lawrys Island
- Lawrys Ledge
- Lazygut Island
- Leadbetter Island
- Leathers Corner
- Leavitt Island
- Lebanon
- LeClair Island
- Ledge Island
- Ledge Island
- Ledge Island (historical)
- Lee
- Lee Island
- Leeds
- Leeds Junction
- Lehman Island
- Leighton Rock
- Lenroy Island
- Les Trois Island
- Levant
- Levesque Island
- Lewiston
- Lewiston Junction
- Lexington
- Leyford Island