| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Abarr | city | Colorado | United States | 39.85 | -102.71 | 4251 | |
| Abbeyville | city | Colorado | United States | 38.78 | -106.49 | 10068 | |
| Abeyta | city | Colorado | United States | 37.08 | -104.19 | 5869 | |
| Able | city | Colorado | United States | 38.06 | -102.87 | 3763 | |
| Acequia | city | Colorado | United States | 39.52 | -105.03 | 5869 | |
| Acres Green | city | Colorado | United States | 39.56 | -104.90 | 5869 | |
| Adams City | city | Colorado | United States | 39.83 | -104.93 | 5150 | |
| Adelaide | city | Colorado | United States | 38.56 | -105.09 | 7549 | |
| Adelaide (historical) | city | Colorado | United States | 39.25 | -106.26 | 10997 | |
| Adena | city | Colorado | United States | 40.01 | -103.89 | 5029 | |
| Adna | city | Colorado | United States | 40.34 | -104.83 | 5029 | |
| Agate | city | Colorado | United States | 39.46 | -103.94 | 5869 | |
| Aguilar | city | Colorado | United States | 37.40 | -104.65 | 6709 | |
| Akin | city | Colorado | United States | 39.25 | -108.26 | 5029 | |
| Akron | city | Colorado | United States | 40.16 | -103.21 | 5029 | |
| Alamo | city | Colorado | United States | 37.66 | -104.96 | 6814 | |
| Alamo Placita | city | Colorado | United States | 39.72 | -104.98 | 5298 | |
| Alamosa | city | Colorado | United States | 37.47 | -105.87 | 7549 | |
| Alden | city | Colorado | United States | 40.46 | -104.58 | 5029 | |
| Alder | city | Colorado | United States | 38.37 | -106.04 | 8510 | |
| Algonquin Acres | city | Colorado | United States | 39.60 | -104.83 | 5869 | |
| Alice | city | Colorado | United States | 39.82 | -105.64 | 10252 | |
| Alkire Estates | city | Colorado | United States | 39.84 | -105.14 | 5869 | |
| Allenspark | city | Colorado | United States | 40.19 | -105.53 | 8398 | |
| Allison | city | Colorado | United States | 37.02 | -107.49 | 6194 | |
| Alma | city | Colorado | United States | 39.28 | -106.06 | 10400 | |
| Alma Junction | city | Colorado | United States | 39.27 | -106.05 | 10367 | |
| Almont | city | Colorado | United States | 38.66 | -106.85 | 8389 | |
| Alpine | city | Colorado | United States | 37.69 | -106.59 | 8389 | |
| Alpine (historical) | city | Colorado | United States | 38.71 | -106.28 | 10068 | |
| Alta (historical) | city | Colorado | United States | 37.89 | -107.85 | 11748 | |
| Alta Vista | city | Colorado | United States | 39.81 | -105.09 | 5354 | |
| Alta Vista | city | Colorado | United States | 39.03 | -104.11 | 6709 | |
| Altman (historical) | city | Colorado | United States | 38.74 | -105.13 | 10334 | |
| Altona | city | Colorado | United States | 40.13 | -105.28 | 5869 | |
| Altura | city | Colorado | United States | 39.74 | -104.80 | 5406 | |
| Altura | city | Colorado | United States | 37.18 | -107.19 | 7549 | |
| Alvin | city | Colorado | United States | 40.31 | -102.08 | 3599 | |
| American City (historical) | city | Colorado | United States | 39.87 | -105.59 | 10288 | |
| Americus | city | Colorado | United States | 38.90 | -106.17 | 8389 | |
| Ames | city | Colorado | United States | 37.86 | -107.88 | 9228 | |
| Amherst | city | Colorado | United States | 40.68 | -102.17 | 3677 | |
| Anaconda (historical) | city | Colorado | United States | 38.73 | -105.16 | 9612 | |
| Andersonville | city | Colorado | United States | 40.59 | -105.06 | 5029 | |
| Andrix | city | Colorado | United States | 37.28 | -103.19 | 5354 | |
| Angora | city | Colorado | United States | 40.18 | -108.58 | 5442 | |
| Animas Forks (historical) | city | Colorado | United States | 37.93 | -107.57 | 11748 | |
| Ansel | city | Colorado | United States | 37.70 | -106.10 | 7578 | |
| Antero Junction | city | Colorado | United States | 38.92 | -105.97 | 9284 | |
| Antlers | city | Colorado | United States | 39.54 | -107.73 | 5396 | |
| Anton | city | Colorado | United States | 39.74 | -103.22 | 5029 | |
| Antonito | city | Colorado | United States | 37.08 | -106.01 | 7887 | |
| Anvil Points | city | Colorado | United States | 39.52 | -107.92 | 5869 | |
| Apache City | city | Colorado | United States | 37.86 | -104.83 | 5918 | |
| Apache Mesa | city | Colorado | United States | 39.73 | -104.80 | 5869 | |
| Apex (historical) | city | Colorado | United States | 39.87 | -105.57 | 10475 | |
| Apple Meadows | city | Colorado | United States | 39.80 | -105.21 | 5869 | |
| Appleton | city | Colorado | United States | 39.12 | -108.61 | 4570 | |
| Applewood | city | Colorado | United States | 39.76 | -105.16 | 5869 | |
| Applewood Glen | city | Colorado | United States | 39.75 | -105.13 | 5869 | |
| Applewood Grove | city | Colorado | United States | 39.74 | -105.15 | 5869 | |
| Applewood Village | city | Colorado | United States | 39.77 | -105.13 | 5869 | |
| Ara | city | Colorado | United States | 40.02 | -105.25 | 5357 | |
| Arapahoe | city | Colorado | United States | 38.85 | -102.18 | 4189 | |
| Arboles | city | Colorado | United States | 37.03 | -107.42 | 6194 | |
| Archer | city | Colorado | United States | 39.53 | -105.08 | 5869 | |
| Argo Mill | city | Colorado | United States | 39.74 | -105.51 | 7949 | |
| Arickaree | city | Colorado | United States | 39.70 | -103.07 | 5029 | |
| Aristocrat Ranchettes | city | Colorado | United States | 40.11 | -104.76 | 5059 | |
| Arlington | city | Colorado | United States | 38.34 | -103.34 | 4248 | |
| Armel | city | Colorado | United States | 39.80 | -102.11 | 4189 | |
| Aroya | city | Colorado | United States | 38.85 | -103.13 | 4547 | |
| Arriba | city | Colorado | United States | 39.29 | -103.28 | 5216 | |
| Arriola | city | Colorado | United States | 37.44 | -108.65 | 6709 | |
| Arrowhead | city | Colorado | United States | 40.58 | -105.02 | 5029 | |
| Arrowhead Village | city | Colorado | United States | 39.63 | -106.57 | 7549 | |
| Arrowood | city | Colorado | United States | 40.19 | -105.51 | 8786 | |
| Arvada | city | Colorado | United States | 39.80 | -105.09 | 5298 | |
| Ashcroft | city | Colorado | United States | 39.05 | -106.80 | 10068 | |
| Aspen | city | Colorado | United States | 39.19 | -106.82 | 8389 | |
| Aspen Creek | city | Colorado | United States | 39.95 | -105.05 | 5360 | |
| Aspen Meadows | city | Colorado | United States | 39.98 | -105.41 | 8398 | |
| Aspen Park | city | Colorado | United States | 39.54 | -105.29 | 8398 | |
| Astor City (historical) | city | Colorado | United States | 39.55 | -106.41 | 8389 | |
| Atchee | city | Colorado | United States | 39.56 | -108.91 | 6709 | |
| Atlanta | city | Colorado | United States | 37.50 | -103.00 | 5029 | |
| Atwood | city | Colorado | United States | 40.55 | -103.27 | 4189 | |
| Auburn | city | Colorado | United States | 40.37 | -104.64 | 5029 | |
| Ault | city | Colorado | United States | 40.58 | -104.73 | 5029 | |
| Aurora | city | Colorado | United States | 39.73 | -104.83 | 5403 | |
| Aurora Heights | city | Colorado | United States | 39.74 | -104.86 | 5396 | |
| Aurora Highlands | city | Colorado | United States | 39.69 | -104.78 | 5869 | |
| Aurora Hills | city | Colorado | United States | 39.71 | -104.85 | 5869 | |
| Aurora Knolls | city | Colorado | United States | 39.68 | -104.78 | 5869 | |
| Austin | city | Colorado | United States | 38.78 | -107.95 | 5150 | |
| Avalo | city | Colorado | United States | 40.80 | -103.65 | 4543 | |
| Avon | city | Colorado | United States | 39.63 | -106.52 | 7549 | |
| Avondale | city | Colorado | United States | 38.24 | -104.35 | 4514 | |
| Axial | city | Colorado | United States | 40.29 | -107.79 | 6709 | |
| Ayer | city | Colorado | United States | 37.76 | -103.85 | 4570 |