8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Blanding | 1 | 3,056 | 3,388 | -2.11% | 232 | 13.18 | City |
| Monticello | 2 | 1,669 | 1,818 | -1.77% | 498 | 3.35 | City |
| Aneth | 3 | 302 | 459 | -4.43% | 27 | 11.03 | CDP |
| Montezuma Creek | 4 | 256 | 324 | -2.29% | 21 | 11.95 | CDP |
| Bluff | 5 | 246 | 243 | 0.41% | 7 | 36.64 | Town |
| La Sal | 6 | 239 | 255 | -4.02% | 5 | 47.56 | CDP |
| Tselakai Dezza | 7 | 84 | 51 | -2.33% | 4 | 19.98 | CDP |
| White Mesa | 8 | 15 | 138 | -50% | 1 | 15.65 | CDP |
Blanding is the largest city in San Juan County, with a population of 3,056.
White Mesa is the smallest city in San Juan County.
There are 8 cities in San Juan County, Utah.