23 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Meridian | Ada County | 144,801 |
| Moscow | Latah County | 27,237 |
| Mountain Home | Elmore County | 17,121 |
| Middleton | Canyon County | 12,270 |
| McCall | Valley County | 4,200 |
| Mountain Home AFB | Elmore County | 3,170 |
| Montpelier | Bear Lake County | 2,710 |
| Malad City | Oneida County | 2,334 |
| Moreland | Bingham County | 1,359 |
| Moyie Springs | Boundary County | 1,323 |
| Marsing | Owyhee County | 1,248 |
| McCammon | Bannock County | 823 |
| Menan | Jefferson County | 738 |
| Mullan | Shoshone County | 682 |
| Melba | Canyon County | 638 |
| Mackay | Custer County | 489 |
| Mud Lake | Jefferson County | 369 |
| Midvale | Washington County | 224 |
| Murphy | Owyhee County | 215 |
| Malta | Cassia County | 181 |
| Moore | Butte County | 178 |
| Murtaugh | Twin Falls County | 125 |
| Minidoka | Minidoka County | 84 |