| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moab | 1 | 5,163 | 5,365 | -0.83% | 1,075 | 5 | City |
| Castle Valley | 2 | 372 | 349 | 0.81% | 42 | 9 | Town |
Moab is the largest city in Grand County, with a population of 5,163.
Castle Valley is the smallest city in Grand County, with a population of 372.
There are 2 cities in Grand County, Utah.