| City | Population |
| Alamosa, CO | 8,780 |
| Alamosa County rural, CO | 5,104 |
| Alamosa East, CO | 1,458 |
| Alpine, CO | 174 |
| Antonito town, CO | 781 |
| Blanca town, CO | 385 |
| Capulin, CO | 200 |
| Center town, CO | 2,230 |
| Conejos, CO | 58 |
| Conejos County rural, CO | 4,125 |
| Costilla County rural, CO | 2,037 |
| Crestone town, CO | 127 |
| Del Norte town, CO | 1,686 |
| Fort Garland, CO | 433 |
| Gerrard, CO | 278 |
| Hooper town, CO | 103 |
| La Jara town, CO | 818 |
| Manassa town, CO | 991 |
| Moffat town, CO | 116 |
| Monte Vista, CO | 4,444 |
| Rio Grande County rural, CO | 5,014 |
| Romeo town, CO | 404 |
| Saguache County rural, CO | 3,134 |
| Saguache town, CO | 485 |
| San Acacio, CO | 40 |
| San Luis town, CO | 629 |
| Sanford town, CO | 879 |
| South Fork town, CO | 386 |
| Costilla, NM | 205 |
| San Cristobal, NM | 273 |
| | |
| Total | 45,777 |
