A
- Abbot
- Abingdon
- Adair
- Adams
- Adams Corner
- Addieville
- Addison
- Addition
- Adeline
- Aden
- Adenmoor
- Adrain
- Advance
- Afolkey
- Agnew
- Aiken
- Akin
- Akin Junction
- Akron
- Albany
- Albers
- Albion
- Alda
- Alden
- Aldridge
- Aledo
- Alexander
- Alexis
- Algonquin
- Alhambra
- Aliceville
- Allen
- Allendale
- Allens Corners
- Allens Spring
- Allentown
- Allenville
- Allerton
- Allright
- Alma
- Almora
- Alonzo
- Alorton
- Alpha
- Alpine
- Alsey
- Alsip
- Alta
- Altamont
- Altgeld Gardens
- Altmar
- Alton
- Altona
- Alto Pass
- Altorf
- Alvin
- Alworth
- Amboy
- Amenia
- Ament Corners
- America
- Ames
- Amity
- Anchor
- Ancona
- Andalusia
- Anderson
- Anderson
- Andover
- Andres
- Andrew
- Andrews and Hurds Subdivision
- Anna
- Annapolis
- Annawan
- Antioch
- Appaloosa West
- Appel Siding
- Applegate
- Apple River
- Appleton
- Aptakisic
- Arbury Hills
- Arcadia
- Archer
- Arcola
- Arenzville
- Argenta
- Argo Fay
- Argyle
- Arlington
- Arlington Heights
- Armington
- Armstrong
- Arnold
- Arnold
- Aroma Park
- Arpee
- Arrowsmith
- Arthur
- Ashdale Junction
- Ashkum
- Ashland
- Ashley
- Ashmore
- Ashton
- Assumption
- Astoria
- Athens
- Athensville
- Atkinson
- Atlanta
- Atlas
- Atterbury
- Attila
- Atwater
- Atwood
- Auburn
- Augerville
- Augsburg
- Augusta
- Aurora
- Austin
- Aux Sable
- Ava
- Avena
- Avery Hill
- Averyville
- Aviston
- Avon
- Ayers