City | Rank | County | 2024 Pop. |
|---|---|---|---|
| Boise City | 1 | Ada County | 235,216 |
| Meridian | 2 | Ada County | 139,920 |
| Nampa | 3 | Canyon County | 118,587 |
| Caldwell | 4 | Canyon County | 70,901 |
| Eagle | 5 | Ada County | 32,802 |
| Kuna | 6 | Ada County | 29,238 |
| Star | 7 | Ada County | 17,961 |
| Mountain Home | 8 | Elmore County | 16,921 |
| Garden City | 9 | Ada County | 12,947 |
| Middleton | 10 | Canyon County | 11,501 |
| Hidden Springs | 11 | Ada County | 3,801 |
| Homedale | 12 | Owyhee County | 3,222 |
| Mountain Home AFB | 13 | Elmore County | 3,175 |
| Parma | 14 | Canyon County | 2,167 |
| Wilder | 15 | Canyon County | 1,715 |
| Avimor | 16 | Ada County | 1,533 |
| Glenns Ferry | 17 | Elmore County | 1,311 |
| Marsing | 18 | Owyhee County | 1,264 |
| Robie Creek | 19 | Ada County | 1,250 |
| Greenleaf | 20 | Canyon County | 783 |
| Notus | 21 | Canyon County | 602 |
| Melba | 22 | Canyon County | 593 |
| Idaho City | 23 | Boise County | 549 |
| Grand View | 24 | Owyhee County | 471 |
| Hammett | 25 | Elmore County | 295 |
| Murphy | 26 | Owyhee County | 201 |
| Bruneau | 27 | Owyhee County | 48 |