4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monte Vista | 1 | 3,949 | 4,251 | -1.5% | 1,497 | 2.64 | City |
| Center | 2 | 1,919 | 1,931 | -0.1% | 2,221 | 0.86 | Town |
| Del Norte | 3 | 1,384 | 1,456 | -1% | 1,285 | 1.08 | Town |
| South Fork | 4 | 503 | 512 | -0.4% | 198 | 2.54 | Town |
Monte Vista is the largest city in Rio Grande County, with a population of 3,949.
South Fork is the smallest city in Rio Grande County.
There are 4 cities in Rio Grande County, Colorado.