- Aaronsburg
- Abbottstown
- Abington
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- Acme
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- Adah
- Adamsburg
- Adamstown
- Adamsville
- Addison
- Adrian
- Airville
- Akron
- Alba
- Albion
- Albrightsville
- Alburtis
- Aleppo
- Alexandria
- Aliquippa
- Allenport
- Allensville
- Allentown
- Allenwood
- Allison
- Allison Park
- Allport
- Altoona
- Alum Bank
- Alverda
- Alverton
- Amberson
- Ambler
- Ambridge
- Amity
- Analomink
- Andreas
- Anita
- Annville
- Antes Fort
- Apollo
- Aquashicola
- Arcadia
- Archbald
- Arcola
- Ardara
- Ardmore
- Arendtsville
- Aristes
- Armagh
- Armbrust
- Arnot
- Arona
- Artemas
- Ashfield
- Ashland
- Ashville
- Aspers
- Aston
- Atglen
- Athens
- Atlantic
- Atlasburg
- Auburn
- Audubon
- Aultman
- Austin
- Avella
- Avis
- Avondale
- Avonmore
- Baden
- Bainbridge
- Bairdford
- Bakerstown
- Bala Cynwyd
- Bally
- Bangor
- Barnesville
- Bart
- Barto
- Bartonsville
- Bath
- Bausman
- Beach Haven
- Beach Lake
- Beallsville
- Bear Creek
- Bear Lake
- Beaver
- Beaver Falls
- Beaver Meadows
- Beaver Springs
- Beaverdale
- Beavertown
- Beccaria
- Bechtelsville
- Bedford
- Bedminster
- Beech Creek
- Belle Vernon
- Bellefonte
- Belleville
- Bellwood
- Belsano
- Bendersville
- Benezett
- Bensalem
- Bentleyville
- Benton
- Berlin
- Bernville
- Berrysburg
- Berwick
- Berwyn
- Bessemer
- Bethel
- Bethel Park
- Bethlehem
- Beyer
- Big Cove Tannery
- Big Run
- Bigler
- Biglerville
- Birchrunville
- Birdsboro
- Black Lick
- Blain
- Blairs Mills
- Blairsville
- Blakeslee
- Blanchard
- Blandburg
- Blandon
- Blooming Glen
- Bloomsburg
- Blossburg
- Blue Ball
- Blue Bell
- Blue Ridge Summit
- Boalsburg
- Bobtown
- Boiling Springs
- Bolivar
- Boswell
- Bovard
- Bowers
- Bowmanstown
- Bowmansville