| Rank | Median Age ▲ | School District / Population |
| 1. | 22.50 | Madison School District 321 / 33,461 |
| 2. | 25.20 | Moscow School District 281 / 27,525 |
| 3. | 26.80 | Dietrich School District 314 / 816 |
| 4. | 27.30 | Sugar-Salem Joint School District 322 / 4,971 |
| 5. | 28.30 | West Jefferson School District 253 / 2,274 |
| 6. | 29.00 | Mountain Home School District 193 / 24,115 |
| 7. | 29.60 | Bonneville Joint School District 93 / 45,322 |
| 8. | 29.80 | Murtaugh Joint School District 418 / 1,031 |
| 9. | 29.90 | Jefferson County Joint School District 251 / 22,316 |
| 9. | 29.90 | Caldwell School District 132 / 34,538 |
| 11. | 30.20 | Vallivue School District 139 / 38,269 |
| 12. | 30.40 | West Side Joint School District 202 / 2,274 |
| 13. | 30.70 | Wendell School District 232 / 5,436 |
| 14. | 30.80 | Pocatello School District 25 / 76,013 |
| 15. | 31.20 | Kuna Joint School District 3 / 25,863 |
| 15. | 31.20 | Jerome Joint School District 261 / 19,389 |
| 15. | 31.20 | Nampa School District 131 / 83,622 |
| 18. | 31.50 | Blackfoot School District 55 / 21,668 |
| 18. | 31.50 | Three Creek Joint Elementary School District 416 / 73 |
| 20. | 31.60 | Aberdeen School District 58 / 3,702 |
| 20. | 31.60 | Preston Joint School District 201 / 10,253 |
| 22. | 32.00 | Cassia County Joint School District 151 / 22,454 |
| 23. | 32.20 | Shelley Joint School District 60 / 9,417 |
| 24. | 32.30 | Snake River School District 52 / 7,898 |
| 24. | 32.30 | Hansen School District 415 / 2,002 |
| 26. | 32.70 | Shoshone Joint School District 312 / 3,128 |
| 26. | 32.70 | Clark County School District 161 / 982 |
| 28. | 32.90 | American Falls Joint School District 381 / 7,200 |
| 29. | 33.20 | Idaho Falls School District 91 / 56,313 |
| 29. | 33.20 | Teton County School District 401 / 10,170 |
| 31. | 33.30 | Twin Falls School District 411 / 51,059 |
| 32. | 33.50 | Richfield School District 316 / 1,055 |
| 33. | 33.60 | Ririe Joint School District 252 / 2,557 |
| 33. | 33.60 | Rockland School District 382 / 549 |
| 35. | 34.20 | Fremont County Joint School District 215 / 12,140 |
| 36. | 34.50 | Meridian Joint School District 2 / 184,676 |
| 37. | 34.60 | Bruneau-Grand View Joint School District 365 / 2,533 |
| 38. | 34.70 | Gooding Joint School District 231 / 6,805 |
| 38. | 34.70 | Kimberly School District 414 / 6,232 |
| 40. | 34.80 | Wilder School District 133 / 3,063 |
| 40. | 34.80 | Post Falls School District 273 / 36,257 |
| 42. | 34.90 | Firth School District 59 / 3,928 |
| 43. | 35.20 | Minidoka County Joint School District 331 / 20,877 |
| 44. | 35.70 | Fruitland School District 373 / 8,194 |
| 45. | 35.90 | Valley School District 262 / 2,870 |
| 45. | 35.90 | Marsing Joint School District 363 / 4,351 |
| 47. | 36.00 | Boise City Independent School District 1 / 184,995 |
| 48. | 36.10 | North Gem School District 149 / 822 |
| 49. | 36.20 | Castleford School District 417 / 1,408 |
| 50. | 36.30 | Grace Joint School District 148 / 2,249 |
| 51. | 36.40 | Melba Joint School District 136 / 3,241 |
| 52. | 36.50 | Homedale Joint School District 370 / 5,710 |
| 53. | 36.90 | Middleton School District 134 / 15,084 |
| 54. | 37.10 | Filer School District 413 / 6,845 |
| 55. | 37.30 | Notus School District 135 / 1,701 |
| 56. | 37.50 | Parma School District 137 / 5,163 |
| 57. | 38.00 | Payette Joint School District 371 / 9,962 |
| 58. | 38.20 | New Plymouth School District 372 / 4,602 |
| 59. | 38.70 | Cottonwood Joint School District 242 / 2,675 |
| 60. | 39.00 | Bliss Joint School District 234 / 749 |
| 61. | 39.20 | Oneida County School District 351 / 4,240 |
| 62. | 39.40 | Soda Springs Joint School District 150 / 4,338 |
| 62. | 39.40 | Coeur d'Alene School District 271 / 71,692 |
| 64. | 40.20 | Bear Lake County School District 33 / 5,835 |
| 64. | 40.20 | Lewiston Independent School District 340 / 34,136 |
| 66. | 40.30 | Genesee Joint School District 282 / 1,716 |
| 67. | 40.40 | Buhl Joint School District 412 / 8,666 |
| 67. | 40.40 | Blaine County School District 61 / 21,376 |
| 69. | 41.00 | Plummer-Worley Joint School District 44 / 3,831 |
| 70. | 41.10 | Lakeland Joint School District 272 / 26,553 |
| 71. | 41.20 | Weiser School District 431 / 8,470 |
| 72. | 41.40 | Marsh Valley Joint School District 21 / 6,824 |
| 73. | 41.60 | Horseshoe Bend School District 73 / 1,667 |
| 74. | 41.80 | Butte County Joint School District 111 / 2,825 |
| 75. | 41.90 | Lapwai School District 341 / 3,162 |
| 76. | 42.70 | Potlatch School District 285 / 3,281 |
| 77. | 42.80 | Boundary County School District 101 / 10,972 |
| 78. | 42.90 | Emmett Independent School District 221 / 16,719 |
| 79. | 43.40 | Troy School District 287 / 2,008 |
| 80. | 44.00 | Glenns Ferry Joint School District 192 / 2,666 |
| 81. | 44.30 | Camas County School District 121 / 1,117 |
| 82. | 44.60 | McCall-Donnelly Joint School District 421 / 7,552 |
| 83. | 44.90 | Kellogg Joint School District 391 / 8,365 |
| 84. | 45.30 | Lake Pend Oreille School District 84 / 29,408 |
| 85. | 45.60 | Whitepine Joint School District 288 / 1,669 |
| 86. | 45.70 | Nezperce Joint School District 302 / 940 |
| 87. | 46.10 | Hagerman Joint School District 233 / 2,433 |
| 88. | 46.40 | St. Maries Joint School District 41 / 6,788 |
| 89. | 46.90 | West Bonner County School District 83 / 11,433 |
| 90. | 47.40 | Challis Joint School District 181 / 3,104 |
| 91. | 48.10 | Mullan School District 392 / 770 |
| 91. | 48.10 | Meadows Valley School District 11 / 1,483 |
| 93. | 48.40 | Wallace School District 393 / 4,254 |
| 93. | 48.40 | Basin School District 72 / 3,399 |
| 95. | 48.50 | Arbon Elementary School District 383 / 139 |
| 96. | 49.00 | Orofino Joint School District 171 / 8,993 |
| 97. | 49.10 | South Lemhi School District 292 / 625 |
| 97. | 49.10 | Highland Joint School District 305 / 1,475 |
| 99. | 49.20 | Mackay Joint School District 182 / 1,487 |
| 99. | 49.20 | Mountain View School District 244 / 9,920 |
| 101. | 49.40 | Kamiah Joint School District 304 / 3,927 |
| 102. | 49.80 | Salmon School District 291 / 7,154 |
| 103. | 50.00 | Culdesac Joint School District 342 / 883 |
| 104. | 50.70 | Avery School District 394 / 340 |
| 105. | 50.80 | Prairie Elementary School District 191 / 109 |
| 105. | 50.80 | Kendrick Joint School District 283 / 1,739 |
| 107. | 51.00 | Council School District 13 / 2,025 |
| 108. | 51.80 | Midvale School District 433 / 664 |
| 108. | 51.80 | Swan Valley Elementary School District 92 / 758 |
| 110. | 52.00 | Pleasant Valley Elementary School District 364 / 98 |
| 111. | 52.50 | Garden Valley School District 71 / 1,961 |
| 112. | 52.60 | Cascade School District 422 / 2,410 |
| 113. | 52.70 | Kootenai Joint School District 274 / 1,730 |
| 114. | 53.20 | Salmon River School District 243 / 1,459 |
| 115. | 54.00 | Cambridge Joint School District 432 / 1,147 |
Please note that we only rank locations with 'Median Age' data. The rank above might not be a complete list. Locations without 'Median Age' data are not listed.
