- Altona
- Altorf
- Alvin
- Alworth
- Amboy
- Amenia
- Ament Corners
- America
- Ames
- Amity
- Anand Brook
- Anchor
- Ancient Tree
- Ancona
- Andalusia
- Andalusia Island
- Anderson
- Anderson
- Andover
- Andres
- Andrew
- Andrews and Hurds Subdivision
- Anetsberger's Subdivision
- Angelo Towhead
- Anna
- Annapolis
- Annawan
- Anns Mobile Home Park
- Antioch
- Appaloosa West