7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Manassa | 1 | 970 | 947 | 0.52% | 1,042 | 0.93 | Town |
| Sanford | 2 | 900 | 879 | 0.45% | 616 | 1.46 | Town |
| La Jara | 3 | 708 | 728 | -0.56% | 1,735 | 0.41 | Town |
| Antonito | 4 | 610 | 639 | -0.97% | 1,429 | 0.43 | Town |
| Capulin | 5 | 326 | 164 | 2.52% | 344 | 0.95 | CDP |
| Romeo | 6 | 312 | 299 | 0.97% | 1,339 | 0.23 | Town |
| San Acacio | 7 | 71 | 135 | 7.58% | 56 | 1.26 | CDP |
Manassa is the largest city in Conejos County, with a population of 970.
San Acacio is the smallest city in Conejos County, with a population of 71.
There are 7 cities in Conejos County, Colorado.