| Arp, TX (City) |
| Arpin, WI (Town) |
| Arpin, WI (Village) |
| Arriba, CO (Town) |
| Arrington Township, IL (Township) |
| Arrow Point, MO (Village) |
| Arrow Rock, MO (Town) |
| Arrowhead, MN (Township) |
| Arrowsic, ME (Town) |
| Arrowsmith, IL (Village) |
| Arrowsmith Township, IL (Township) |
| Arroyo Grande, CA (City) |
| Artas, SD (Town) |
| Artesia, CA (City) |
| Artesia, MS (Town) |
