- Buck Island
- Buckle Island
- Buckle Island
- Bucks Mills
- Buckskin Island
- Bucksport Center
- Burnt Ledge
- Burying Island
- Butter Island
- Butterfield Island
- Blue Hill
- Back Narrows
- Bar Island
- Barters Island
- Beaver Island
- Benner Corner
- Berry Island
- Bird Feather Island
- Bogues Corner
- Boston Island
- Bremen Long Island
- Broad Cove
- Bryant Island
- Burnt Island
- Boothbay
- Boothbay Harbor
- Bowdoinham
- Bowerbank
- Brewer
- Bridgton