8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Blanding | 1 | 3,174 | 3,383 | -1.31% | 241 | 13 | City |
| Monticello | 2 | 1,739 | 1,827 | -1.02% | 519 | 3 | City |
| Aneth | 3 | 302 | 459 | -4.43% | 27 | 11 | CDP |
| Montezuma Creek | 4 | 256 | 324 | -2.29% | 21 | 12 | CDP |
| Bluff | 5 | 252 | 242 | 0.8% | 7 | 37 | Town |
| La Sal | 6 | 239 | 255 | -4.02% | 5 | 48 | CDP |
| Tselakai Dezza | 7 | 84 | 51 | -2.33% | 4 | 20 | CDP |
| White Mesa | 8 | 15 | 138 | -50% | 1 | 16 | CDP |
Blanding is the largest city in San Juan County, with a population of 3,174.
White Mesa is the smallest city in San Juan County, with a population of 15.
There are 8 cities in San Juan County, Utah.