| City Name | County Name: | Population | Median Age |
| Aberdeen | Bingham | 1,977 | 21.9 |
| American Falls | Power | 4,345 | 34.3 |
| Ammon | Bonneville | 17,115 | 31.6 |
| Arbon Valley | Power | 1,124 | 41.9 |
| Ashton | Fremont | 1,050 | 45.9 |
| Bellevue | Blaine | 2,456 | 37.8 |
| Blackfoot | Bingham | 15,526 | 31.8 |
| Boise | Ada | 389,280 | 36.6 |
| Bonners Ferry | Boundary | 2,710 | 44.8 |
| Buhl | Twin Falls | 4,524 | 43.4 |
| Burley | Cassia | 16,342 | 30.1 |
| Caldwell | Canyon | 58,481 | 29.7 |
| Cascade | Valley | 1,025 | 44.4 |
| Challis | Custer | 1,091 | 45.1 |
| Chubbuck | Bannock | 15,588 | 32.2 |
| Coeur d'Alene | Kootenai | 116,834 | 36.8 |
| Dalton Gardens | Kootenai | 2,410 | 46.6 |
| Driggs | Teton | 1,817 | 35.2 |
| Eagle | Ada | 29,796 | 47.1 |
| Emmett | Gem | 9,889 | 36.2 |
| Filer | Twin Falls | 3,083 | 30.4 |
| Fort Hall | Bannock | 2,971 | 38.7 |
| Fruitland | Payette | 5,426 | 40.4 |
| Garden City | Ada | 11,969 | 48.7 |
| Glenns Ferry | Elmore | 1,303 | 42.9 |
| Gooding | Gooding | 3,600 | 41.4 |
| Grangeville | Idaho | 3,245 | 33 |
| Hailey | Blaine | 11,409 | 38.9 |
| Hansen | Twin Falls | 1,284 | 32.6 |
| Hayden | Kootenai | 15,434 | 43.2 |
| Heyburn | Minidoka | 3,447 | 26.7 |
| Hidden Springs | Ada | 3,164 | 30.5 |
| Homedale | Owyhee | 2,820 | 35.1 |
| Idaho Falls | Bonneville | 100,442 | 33.4 |
| Iona | Bonneville | 2,354 | 28.5 |
| Jerome | Jerome | 11,996 | 31.1 |
| Kamiah | Lewis | 1,244 | 48.1 |
| Kellogg | Shoshone | 3,113 | 33.1 |
| Ketchum | Blaine | 4,160 | 44.6 |
| Kimberly | Twin Falls | 4,054 | 33.8 |
| Kuna | Ada | 22,292 | 29.1 |
| Lapwai | Nez Perce | 1,137 | 32.9 |
| Lewiston | Nez Perce | 53,384 | 39.8 |
| Lincoln | Bonneville | 3,817 | 26.8 |
| Malad City | Oneida | 2,137 | 44.5 |
| Marsing | Owyhee | 1,318 | 32.9 |
| McCall | Valley | 3,597 | 48.9 |
| Meridian | Ada | 114,161 | 36.2 |
| Middleton | Canyon | 8,466 | 30.6 |
| Montpelier | Bear Lake | 2,538 | 37.7 |
| Moreland | Bingham | 1,232 | 32.2 |
| Moscow | Latah | 26,145 | 25 |
| Mountain Home | Elmore | 16,945 | 31.8 |
| Mountain Home AFB | Elmore | 3,009 | 22.5 |
| Nampa | Canyon | 184,428 | 32.4 |
| New Plymouth | Payette | 1,554 | 37.5 |
| Orofino | Clearwater | 3,576 | 40.4 |
| Osburn | Shoshone | 2,523 | 43.6 |
| Parma | Canyon | 2,147 | 38.9 |
| Paul | Minidoka | 1,449 | 38.1 |
| Payette | Payette | 7,727 | 40.5 |
| Pinehurst | Shoshone | 1,626 | 49.7 |
| Plummer | Benewah | 1,029 | 37.9 |
| Pocatello | Bannock | 72,878 | 32.5 |
| Ponderay | Bonner | 1,157 | 38.3 |
| Post Falls | Kootenai | 36,250 | 33.9 |
| Preston | Franklin | 5,557 | 35.8 |
| Priest River | Bonner | 1,893 | 43.8 |
| Rathdrum | Kootenai | 9,150 | 37.7 |
| Rexburg | Madison | 30,979 | 23.2 |
| Rigby | Jefferson | 9,496 | 27 |
| Riverside | Bingham | 1,149 | 27.9 |
| Robie Creek | Boise | 1,312 | 55.2 |
| Rupert | Minidoka | 6,733 | 30.5 |
| Salmon | Lemhi | 3,169 | 42.5 |
| Sandpoint | Bonner | 13,145 | 41.5 |
| Shelley | Bingham | 4,761 | 29.1 |
| Shoshone | Lincoln | 1,502 | 39.8 |
| Soda Springs | Caribou | 3,023 | 34.4 |
| Spirit Lake | Kootenai | 2,533 | 40.2 |
| St. Anthony | Fremont | 3,713 | 33.6 |
| St. Maries | Benewah | 2,658 | 38.4 |
| Star | Ada | 10,532 | 36.4 |
| Sugar City | Madison | 1,452 | 23.6 |
| Sun Valley | Blaine | 1,486 | 61.3 |
| Twin Falls | Twin Falls | 55,556 | 33.3 |
| Tyhee | Bannock | 1,192 | 37.6 |
| Ucon | Bonneville | 1,161 | 25 |
| Victor | Teton | 2,503 | 36.6 |
| Weiser | Washington | 5,524 | 40.2 |
| Wendell | Gooding | 2,714 | 31.2 |
| Wilder | Canyon | 1,823 | 31.6 |