| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Richfield | 1 | 8,534 | 8,153 | 0.66% | 1,395 | 6 | City |
| Monroe | 2 | 2,787 | 2,516 | 1.79% | 780 | 4 | City |
| Salina | 3 | 2,675 | 2,473 | 1.33% | 457 | 6 | City |
| Aurora | 4 | 1,076 | 996 | 1.32% | 1,162 | 1 | City |
| Elsinore | 5 | 918 | 847 | 1.32% | 348 | 3 | Town |
| Annabella | 6 | 910 | 841 | 1.34% | 1,396 | 1 | Town |
| Redmond | 7 | 830 | 768 | 1.22% | 887 | 1 | Town |
| Central Valley | 8 | 699 | 650 | 1.3% | 332 | 2 | Town |
| Glenwood | 9 | 503 | 464 | 1.41% | 967 | 1 | Town |
| Sigurd | 10 | 437 | 403 | 1.39% | 409 | 1 | Town |
| Koosharem | 11 | 315 | 316 | -0.32% | 331 | 1 | Town |
| Joseph | 12 | 314 | 290 | 1.29% | 361 | 1 | Town |
Richfield is the largest city in Sevier County, with a population of 8,534.
Joseph is the smallest city in Sevier County, with a population of 314.
There are 12 cities in Sevier County, Utah.