- Bainbridge Island
- Bangor Trident Base
- Banks Lake South
- Barberton
- Baring
- Barstow
- Basin City
- Battle Ground
- Bay Center
- Bay View
- Beaux Arts Village
- Belfair
- Bell Hill
- Bellevue
- Bellingham
- Benton City
- Bethel
- Bickleton
- Big Lake
- Bingen
- Birch Bay
- Black Diamond
- Blaine
- Bluewood
- Blyn
- Bonney Lake
- Bothell
- Bothell East
- Bothell West
- Boulevard Park
- Boyds
- Brady
- Bremerton
- Brewster
- Bridgeport
- Brier
- Brinnon
- Browns Point
- Brush Prairie
- Bryant
- Bryn Mawr-Skyway
- Buckley
- Bucoda
- Buena
- Bunk Foss
- Burbank
- Burien
- Burley
- Burlington
