| Armenia Township, PA (Township) |
| Armington, IL (Village) |
| Armour, SD (City) |
| Armourdale, ND (Township) |
| Armstrong, MO (City) |
| Armstrong, IN (Township) |
| Armstrong, OK (Town) |
| Armstrong, IA (City) |
| Armstrong County, TX (County) |
| Armstrong County, PA (County) |
| Armstrong Creek Town, WI (Town) |
| Armstrong Grove Township, IA (Township) |
| Armstrong Township, PA (Township) |
| Armstrong Township, PA (Township) |
| Arna, MN (Township) |
