- Andrew Island
- Andrews Island
- Androscoggin Island
- Anguilla Island
- Anson
- Ant Island
- Appledore Island
- Appleton
- Archers Corners
- Arey
- Argyle
- Arnold Corner
- Arnolds Landing
- Arrowsic
- Arrowsic Island
- Arundel
- Arundel
- Asa Island
- Ash Island
- Ash Island
- Ash Point
- Ashdale
- Ashland
- Ashville
- Asticou
- Athearns Corner
- Athens
- Atkinson Mills
- Atlantic
- Attean Landing