- Ardmore
- Aberdeen Park
- Abiff
- Acklena
- Acme Mill
- Acorn
- Acorn Hill
- Acres of Shade Mobile Home Park
- Acton
- Acuff
- Adair
- Adams
- Adams Crossroads
- Adams Grove
- Adams Mill
- Adamsville
- Addison
- Adkins Mill
- Adolphus
- Aethra
- Aetna
- Afton
- Agee (historical)
- Airport Plaza
- Akard Addition
- Akeman Crossroad
- Akins Chapel
- Akins Corner
- Alamo
- Alanthus Hill