| Asturia Community Development District, FL (CDD) |
| Asylum, PA (Township) |
| Atalissa, IA (City) |
| Atascadero, CA (City) |
| Atascosa County, TX (County) |
| Atchison, MO (Township) |
| Atchison, KS (City) |
| Atchison County, KS (County) |
| Atchison County, MO (County) |
| Atglen, PA (Borough) |
| Athalia, OH (Village) |
| Athelstane, WI (Town) |
| Athena, OR (City) |
| Athens, ND (Township) |
| Athens, KS (Township) |
