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| Abingdon | Alton | Armstrong |
| Adair | Altona | Arnold |
| Addieville | Alvin | Aroma Park |
| Addison | Amboy | Arrowsmith |
| Adrian | Anchor | Arthur |
| Akin | Ancona | Ashkum |
| Albany | Andalusia | Ashland |
| Albers | Andover | Ashley |
| Albion | Andrew | Ashmore |
| Alden | Anna | Ashton |
| Aledo | Annapolis | Assumption |
| Alexander | Annawan | Astoria |
| Alexis | Antioch | Athens |
| Algonquin | Apple River | Atkinson |
| Alhambra | Arcadia | Atlanta |
| Allendale | Archer | Atwater |
| Allerton | Arcola | Atwood |
| Alma | Arenzville | Auburn |
| Alorton | Argenta | Augusta |
| Alpha | Argonne | Aurora |
| Alsey | Arlington | Ava |
| Alsip | Arlington Heights | Aviston |
| Altamont | Armington | Avon |
| Alto Pass |