- Back Mountain
- Baidland
- Baldwin
- Bally
- Barkeyville
- Barnesboro (historical)
- Bear Creek Village
- Bear Lake
- Beaver Falls
- Beaver Meadows
- Beaver Springs
- Beavertown
- Bechtelsville
- Bedminster
- Beech Creek
- Bell Acres
- Belle Vernon
- Ben Avon
- Ben Avon Heights
- Bendersville
- Bentleyville
- Bernville
- Berrysburg
- Bethel Park
- Beurys Lake
- Big Beaver
- Big Run
- Biglerville
- Birdsboro
- Black Lick