A
Alamosa – Aurora – Alma – Arriba – Atwood – Avon – Avondale – Arvada – Arboles – Aguilar – Aspen Park – Arapahoe – Almont – Allenspark – Amherst – Arlington – Antonito – Agate – Anton – Akron – Ault – Aspen – Austin
B
Boone – Bailey – Brighton – Burlington – Bond – Branson – Brush – Boulder – Briggsdale – Buena Vista – Boncarbo – Bennett – Bellvue – Black Hawk – Byers – Basalt – Buxton – Big Head – Blanca – Buffalo Creek – Battlement Mesa – Burns – Broomfield – Bedrock – Breckenridge – Bayfield – Bethune – Beulah – Berthoud – Bolder