20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. George | 1 | 108,847 | 96,050 | 2.41% | 1,411 | 77 | City |
| Washington | 2 | 37,216 | 28,638 | 4.83% | 1,030 | 36 | City |
| Hurricane | 3 | 25,888 | 20,212 | 4.59% | 491 | 53 | City |
| Ivins | 4 | 11,615 | 9,079 | 4.56% | 1,229 | 9 | City |
| Santa Clara | 5 | 8,889 | 7,596 | 2.99% | 1,466 | 6 | City |
| La Verkin | 6 | 4,574 | 4,347 | 0.99% | 335 | 14 | City |
| Enterprise | 7 | 2,486 | 2,056 | 3.58% | 284 | 9 | City |
| Toquerville | 8 | 2,022 | 1,885 | 1.35% | 91 | 22 | City |
| Hildale | 9 | 1,288 | 1,151 | 2.14% | 142 | 9 | City |
| Central | 10 | 974 | 940 | 2.53% | 387 | 3 | CDP |
| Apple Valley | 11 | 948 | 862 | 1.83% | 24 | 40 | Town |
| Leeds | 12 | 859 | 864 | -0.12% | 136 | 6 | Town |
| Dammeron Valley | 13 | 820 | 738 | 0.12% | 168 | 5 | CDP |
| Enterprise | 14 | 814 | 844 | 1.75% | 215 | 4 | CDP |
| Virgin | 15 | 718 | 667 | 1.41% | 61 | 12 | Town |
| Springdale | 16 | 613 | 521 | 3.03% | 133 | 5 | Town |
| Veyo | 17 | 356 | 314 | -2.2% | 172 | 2 | CDP |
| Pine Valley | 18 | 341 | 122 | 3.02% | 100 | 3 | CDP |
| New Harmony | 19 | 250 | 238 | 0.81% | 393 | 1 | Town |
| Rockville | 20 | 222 | 226 | -0.45% | 26 | 8 | Town |
St. George is the largest city in Washington County, with a population of 108,847.
Rockville is the smallest city in Washington County, with a population of 222.
There are 20 cities in Washington County, Utah.