12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Richfield | 1 | 8,373 | 8,157 | 0.52% | 1,369 | 6 | City |
| Monroe | 2 | 2,759 | 2,517 | 1.77% | 773 | 4 | City |
| Salina | 3 | 2,644 | 2,473 | 1.3% | 452 | 6 | City |
| Aurora | 4 | 1,066 | 999 | 1.23% | 1,151 | 1 | City |
| Annabella | 5 | 897 | 841 | 1.24% | 1,376 | 1 | Town |
| Elsinore | 6 | 893 | 835 | 1.25% | 339 | 3 | Town |
| Redmond | 7 | 818 | 768 | 1.24% | 874 | 1 | Town |
| Central Valley | 8 | 691 | 650 | 1.17% | 328 | 2 | Town |
| Glenwood | 9 | 498 | 466 | 1.22% | 958 | 1 | Town |
| Sigurd | 10 | 437 | 406 | 1.39% | 409 | 1 | Town |
| Joseph | 11 | 310 | 288 | 1.31% | 357 | 1 | Town |
| Koosharem | 12 | 309 | 314 | -0.32% | 370 | 1 | Town |
Richfield is the largest city in Sevier County, with a population of 8,373.
Koosharem is the smallest city in Sevier County, with a population of 309.
There are 12 cities in Sevier County, Utah.