- Addison
- Alexander
- Alfred
- Allagash
- Alna
- Anson
- Argyle
- Auburn Plains
- Arrowsic
- Arundel
- Acadia
- Adaline
- Andover
- Allens Mills
- Avon Corner
- Alley Island
- Andrew Island
- Archers Corners
- Asa Island
- Ash Island
- Asticou
- Aunt Mollie Island
- Alna Center
- Androscoggin Island
- Allen Island
- Andrews Island
- Ash Island
- Ash Point
- Athearns Corner
- Abbotts Mill