- Ardsley-on-Hudson
- Arena
- Argusville
- Argyle
- Arietta
- Aristo Terrace Mobile Home Park
- Aristotle
- Arkport
- Arkville
- Arkwright
- Arlington
- Arlington
- Armonk
- Armor
- Armory Square
- Arnett
- Arnolds Mill
- Arowley Manor
- Arrochar
- Arrowhead Mobile Home Park
- Arsenal Hill
- Arshamonaque
- Art Village
- Arthur
- Arthur Manor
- Arthursburg
- Arverne
- Asas Island
- Asbury
- Asbury