3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moab | 1 | 5,127 | 5,361 | -0.91% | 1,068 | 4.80 | City |
| Spanish Valley | 2 | 558 | 472 | 0.72% | 39 | 14.20 | CDP |
| Castle Valley | 3 | 371 | 348 | 1.37% | 42 | 8.79 | Town |
Moab is the largest city in Grand County, with a population of 5,127.
Castle Valley is the smallest city in Grand County.
There are 3 cities in Grand County, Utah.