- Bark Ranch
- Basalt
- Battlement Mesa
- Bayfield
- Beaver Creek
- Bennett
- Berkley
- Berthoud
- Bethune
- Beulah Valley
- Black Forest
- Black Hawk
- Blanca
- Blende
- Blue River
- Blue Sky
- Bonanza
- Bonanza Mountain Estates
- Boone
- Boulder
- Bow Mar
- Brandon
- Branson
- Breckenridge
- Breckenridge
- Brick Center
- Brighton
- Brookside
- Broomfield
- Brush
- Buena Vista
- Burlington
- Buttermilk
- Byers
