- Battlement Mesa
- Berthoud
- Beulah Valley
- Black Forest
- Black Hawk
- Boulder
- Bow Mar
- Broomfield
- Brush
- Buttermilk
- Baca Grande
- Bachelor Gulch Village
- Badito
- Bailey
- Bakerville
- Balarat
- Baldwin
- Balfour
- Balltown
- Balzac
- Barela
- Bark Ranch
- Barnesville
- Barr Lake
- Bartlett
- Basin
- Battle Creek
- Baxter
- Baxterville
- Bayou Hills