- Barr Lake
- Berkeley Gardens
- Battlement Mesa
- Brick Center
- Berthoud
- Beulah Valley
- Black Forest
- Black Hawk
- Buckeye Crossroads
- Belleview
- Browns Canon
- Boulder
- Bow Mar
- Broomfield
- Brush
- Big Bend
- Boggsville
- Buttermilk
- Balarat
- Bark Ranch
- Big Elk Meadows
- Bonanza Mountain Estates
- Boulder Junction
- Bakerville
- Berthoud Falls
- Black Eagle Mill
- Blue Valley
- Bountiful
- Brimstone Corner
- Broughton