- Aaronsburg
- Abington
- Ackermanville
- Adamstown
- Airville
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- Alburtis
- Alexandria
- Aliquippa
- Allen
- Allenport
- Allensville
- Allentown
- Allison
- Allison Park
- Allport
- Altoona
- Alverda
- Alverton
- Ambler
- Amity
- Amity Gardens
- Analomink
- Ancient Oaks
- Andreas
- Annville
- Antrim
- Applewold
- Archbald
- Ardmore
- Arlington Heights
- Armagh
- Ashland
- Ashville
- Aston
- Athens
- Audubon
- Aultman
- Avis
- Avondale