City | Rank | County | 2024 Pop. |
|---|---|---|---|
| St. Anthony | 1 | Fremont County | 4,130 |
| Sugar City | 2 | Madison County | 2,243 |
| Ashton | 3 | Fremont County | 951 |
| Teton | 4 | Fremont County | 856 |
| Dubois | 5 | Clark County | 523 |
| Mackay | 6 | Custer County | 492 |
| Newdale | 7 | Fremont County | 332 |
| Parker | 8 | Fremont County | 297 |
| Island Park | 9 | Fremont County | 192 |
| Leadore | 10 | Lemhi County | 101 |
| Spencer | 11 | Clark County | 29 |
| Drummond | 12 | Fremont County | 15 |