- Bar Island
- Barnes Island
- Bartol Island
- Basket Island
- Bass Island
- Bates Island
- Battleship Island
- Bean Island
- Ben Island
- Big Hen Island
- Big Island
- Birch Island
- Birch Island
- Birch Island
- Black Rock
- Blackstrap
- Blue Point
- Blueberry Island
- Blueberry Island
- Bolsters Mills
- Bombazine Island
- Bowman Island
- Bradleys Corner
- Bragdon Island
- Brighton Corner
- Broadview Park
- Brunswick Station
- Bunganuc Landing
- Bush Island
- Beals