| City | Country |
|---|---|
| Aci Catena | Italy |
| Acigne | France |
| Acigol | Turkey |
| Acireale | Italy |
| Aci Sant'Antonio | Italy |
| Ackerly | Texas |
| Ackerman | Mississippi |
| Ackermanville | Pennsylvania |
| Ackley | Iowa |
| Ackworth | Iowa |
| Acme | Washington |
| Acomita Lake | New Mexico |
| Aconibe | Equatorial Guinea |
| Acopiara | Brazil |
| Acorizal | Brazil |
| Acorn | Arkansas |
| A Coruna | Spain |
| Acquapendente | Italy |
| Acquaviva | San Marino |
| Acquaviva delle Fonti | Italy |
| Acque Dolci | Italy |
| Acqui Terme | Italy |
| Acres Green | Colorado |
| Acri | Italy |
| Acs | Hungary |
| Acton | California |
| Acton | Montana |
| Acton Vale | Canada |
| Actopan | Mexico |
| Actopan | Mexico |
| Acu | Brazil |
| Acua | Brazil |
| Acucena | Brazil |
| Acula | Mexico |
| Acushnet Center | Massachusetts |
| Acworth | Georgia |
| Ada | Serbia |
| Ada | Oklahoma |
| Ada | Ohio |
| Ada | Kansas |
| Ada | Minnesota |
| Adachi | Japan |
| Adair | Oklahoma |
| Adair | Illinois |
| Adair | Iowa |
| Adairsville | Georgia |
| Adair Village | Oregon |
| Adairville | Kentucky |
| Adak | Alaska |
| Adamantina | Brazil |