- Acres Green (Population: 3,205)
- Air Force Academy (Population: 7,526)
- Akron (Population: 1,711)
- Alamosa (Population: 7,960)
- Alamosa East (Population: 1,528)
- Applewood (Population: 7,123)
- Aristocrat Ranchettes (Population: 1,254)
- Arvada (Population: 102,153)
- Aspen (Population: 5,914)
- Ault (Population: 1,432)
- Aurora (Population: 276,393)
- Avon (Population: 5,561)
