| Rank | Median Age ▲ | School District / Population |
| 1. | 15.80 | Yellowstone Academy Elementary School District / 75 |
| 2. | 22.30 | Rocky Boy Elementary School District / 3,005 |
| 3. | 22.80 | Lame Deer Elementary School District / 2,771 |
| 4. | 23.90 | Brockton Elementary School District / 556 |
| 4. | 23.90 | Brockton High School District / 556 |
| 6. | 24.60 | Rocky Boy High School District / 1,784 |
| 7. | 24.80 | Lame Deer High School District / 5,376 |
| 8. | 25.00 | Auchard Creek Elementary School District / 152 |
| 9. | 25.60 | Heart Butte K-12 Schools / 748 |
| 10. | 26.00 | Frazer Elementary School District / 544 |
| 11. | 26.40 | Poplar Elementary School District / 3,523 |
| 11. | 26.40 | Poplar High School District / 3,523 |
| 13. | 26.50 | Hays-Lodge Pole K-12 Schools / 1,322 |
| 14. | 27.00 | Ayers Elementary School District / 84 |
| 14. | 27.00 | Mountain View Elementary School District / 124 |
| 16. | 27.60 | Browning Elementary School District / 8,320 |
| 17. | 27.70 | Lodge Grass Elementary School District / 1,774 |
| 18. | 28.20 | Browning High School District / 8,869 |
| 19. | 28.30 | Lodge Grass High School District / 2,229 |
| 20. | 28.80 | Pleasant Valley Elementary School District / 164 |
| 21. | 29.10 | Harlem Elementary School District / 2,405 |
| 22. | 29.30 | Box Elder High School District / 421 |
| 22. | 29.30 | Box Elder Elementary School District / 421 |
| 24. | 29.40 | Big Sandy High School District / 2,415 |
| 25. | 29.50 | Liberty Elementary School District / 234 |
| 26. | 29.70 | Bozeman Elementary School District / 51,460 |
| 26. | 29.70 | Harlem High School District / 2,533 |
| 28. | 29.90 | Frazer High School District / 743 |
| 28. | 29.90 | Gildford Colony Elementary School District / 129 |
| 30. | 30.20 | Wyola Elementary School District / 455 |
| 31. | 30.50 | North Harlem Colony Elementary School District / 44 |
| 32. | 30.90 | Miami Elementary School District / 255 |
| 32. | 30.90 | Bozeman High School District / 59,653 |
| 34. | 31.00 | Deerfield Elementary School District / 58 |
| 35. | 31.30 | Wolf Point Elementary School District / 4,205 |
| 36. | 31.40 | Missoula Elementary School District / 68,646 |
| 37. | 31.50 | Plenty Coups High School District / 732 |
| 37. | 31.50 | Pryor Elementary School District / 732 |
| 39. | 31.60 | Hardin Elementary School District / 9,478 |
| 40. | 31.70 | Ashland Elementary School District / 1,275 |
| 41. | 31.90 | Pendroy Elementary School District / 312 |
| 42. | 32.20 | Elysian Elementary School District / 1,084 |
| 43. | 32.30 | Wolf Point High School District / 4,635 |
| 44. | 32.80 | Hardin High School District / 8,178 |
| 45. | 33.00 | Ronan Elementary School District / 8,645 |
| 45. | 33.00 | Ronan High School District / 8,645 |
| 45. | 33.00 | Belgrade Elementary School District / 19,906 |
| 48. | 33.10 | Belgrade High School District / 20,094 |
| 49. | 33.70 | Missoula High School District / 100,417 |
| 50. | 34.50 | Spring Creek Elementary School District / 101 |
| 51. | 34.80 | Lustre Elementary School District / 199 |
| 52. | 35.40 | Hellgate Elementary School District / 12,805 |
| 53. | 35.50 | Havre Elementary School District / 12,252 |
| 53. | 35.50 | S Y Elementary School District / 73 |
| 55. | 35.60 | Lolo Elementary School District / 5,126 |
| 56. | 35.80 | De Smet Elementary School District / 857 |
| 56. | 35.80 | Havre High School District / 12,655 |
| 58. | 36.40 | West Valley Elementary School District / 3,770 |
| 59. | 36.70 | Evergreen Elementary School District / 6,002 |
| 60. | 36.80 | Smith Valley Elementary School District / 1,902 |
| 61. | 36.90 | Ophir Elementary School District / 2,153 |
| 62. | 37.00 | Trail Creek Elementary School District / 42 |
| 63. | 37.10 | Lockwood Elementary School District / 7,865 |
| 64. | 37.20 | Bonner Elementary School District / 2,566 |
| 65. | 37.60 | Billings Elementary School District / 107,977 |
| 65. | 37.60 | Monforton Elementary School District / 2,039 |
| 67. | 37.90 | Kalispell Elementary School District / 27,692 |
| 67. | 37.90 | Great Falls Elementary School District / 72,018 |
| 69. | 38.00 | Great Falls High School District / 72,159 |
| 69. | 38.00 | Billings High School District / 127,987 |
| 71. | 38.10 | St. Ignatius K-12 Schools / 3,276 |
| 72. | 38.30 | Whitewater K-12 Schools / 199 |
| 73. | 38.50 | Whitlash Elementary School District / 39 |
| 73. | 38.50 | Spring Creek Elementary School District / 64 |
| 75. | 38.60 | East Glacier Park Elementary School District / 549 |
| 76. | 38.80 | Colstrip Elementary School District / 2,493 |
| 76. | 38.80 | Colstrip High School District / 2,493 |
| 78. | 38.90 | Morin Elementary School District / 403 |
| 79. | 39.00 | East Helena Elementary School District / 8,680 |
| 80. | 39.30 | Arlee High School District / 2,530 |
| 80. | 39.30 | Arlee Elementary School District / 2,530 |
| 82. | 39.40 | Laurel High School District / 10,696 |
| 83. | 39.50 | Flathead High School District / 57,390 |
| 83. | 39.50 | Charlo Elementary School District / 1,332 |
| 83. | 39.50 | Laurel Elementary School District / 11,043 |
| 86. | 39.60 | Independent Elementary School District / 2,624 |
| 87. | 39.70 | Charlo High School District / 1,792 |
| 87. | 39.70 | Shepherd High School District / 3,881 |
| 87. | 39.70 | Shepherd Elementary School District / 3,881 |
| 90. | 39.90 | Fairview Elementary School District / 1,321 |
| 90. | 39.90 | Dillon Elementary School District / 7,757 |
| 92. | 40.00 | Malmborg Elementary School District / 206 |
| 92. | 40.00 | Cut Bank High School District / 4,530 |
| 94. | 40.10 | Gold Creek Elementary School District / 231 |
| 95. | 40.20 | Helena Elementary School District / 50,423 |
| 96. | 40.30 | Dupuyer Elementary School District / 374 |
| 96. | 40.30 | Frenchtown K-12 Schools / 6,582 |
| 96. | 40.30 | Spring Creek Colony Elementary School District / 53 |
| 96. | 40.30 | Knees Elementary School District / 168 |
| 96. | 40.30 | Helena Flats Elementary School District / 1,844 |
| 101. | 40.40 | Helena High School District / 61,307 |
| 101. | 40.40 | Cut Bank Elementary School District / 4,406 |
| 103. | 40.50 | Ross Elementary School District / 25 |
| 104. | 40.60 | Valley View Elementary School District / 253 |
| 104. | 40.60 | Elder Grove Elementary School District / 3,014 |
| 104. | 40.60 | Shelby Elementary School District / 3,829 |
| 104. | 40.60 | Fairview High School District / 1,401 |
| 108. | 40.70 | Three Forks High School District / 3,480 |
| 109. | 40.80 | Three Forks Elementary School District / 3,509 |
| 110. | 40.90 | Sidney Elementary School District / 6,817 |
| 111. | 41.00 | Davey Elementary School District / 62 |
| 111. | 41.00 | Dixon Elementary School District / 460 |
| 111. | 41.00 | Butte Elementary School District / 32,592 |
| 111. | 41.00 | Broadview High School District / 927 |
| 111. | 41.00 | Bainville K-12 Schools / 364 |
| 111. | 41.00 | Park City High School District / 2,082 |
| 117. | 41.10 | Columbia Falls Elementary School District / 14,331 |
| 117. | 41.10 | Broadview Elementary School District / 838 |
| 119. | 41.20 | Miles City Elementary School District / 9,934 |
| 119. | 41.20 | Shelby High School District / 4,092 |
| 119. | 41.20 | Sidney High School District / 7,392 |
| 119. | 41.20 | Amsterdam Elementary School District / 1,808 |
| 123. | 41.30 | Butte High School District / 34,152 |
| 123. | 41.30 | Pine Grove Elementary School District / 87 |
| 123. | 41.30 | Pioneer Elementary School District / 913 |
| 123. | 41.30 | Jackson Elementary School District / 152 |
| 127. | 41.40 | Beaverhead County High School District / 8,738 |
| 128. | 41.50 | Cleveland Elementary School District / 81 |
| 129. | 41.60 | Greycliff Elementary School District / 348 |
| 130. | 41.70 | Columbia Falls High School District / 14,817 |
| 131. | 41.80 | Kinsey Elementary School District / 496 |
| 132. | 41.90 | Baker K-12 Schools / 2,470 |
| 133. | 42.10 | Custer County High School District / 11,699 |
| 134. | 42.20 | Manhattan High School District / 4,564 |
| 134. | 42.20 | Park City Elementary School District / 2,282 |
| 136. | 42.30 | Corvallis K-12 Schools / 7,645 |
| 137. | 42.40 | Huntley Project K-12 Schools / 4,244 |
| 137. | 42.40 | Clinton Elementary School District / 2,354 |
| 139. | 42.50 | Glendive Elementary School District / 6,441 |
| 139. | 42.50 | Kester Elementary School District / 79 |
| 141. | 42.60 | Sunburst K-12 Schools / 1,232 |
| 141. | 42.60 | Livingston Elementary School District / 10,406 |
| 143. | 42.70 | Lambert High School District / 347 |
| 143. | 42.70 | Manhattan Elementary School District / 2,703 |
| 145. | 42.80 | Fairfield Elementary School District / 1,245 |
| 146. | 42.90 | Melville Elementary School District / 219 |
| 146. | 42.90 | Somers Elementary School District / 6,311 |
| 146. | 42.90 | Savage High School District / 606 |
| 146. | 42.90 | Valier High School District / 1,355 |
| 150. | 43.00 | Molt Elementary School District / 192 |
| 150. | 43.00 | Dawson High School District / 8,479 |
| 152. | 43.20 | Savage Elementary School District / 586 |
| 152. | 43.20 | Whitefish Elementary School District / 12,979 |
| 152. | 43.20 | Harlowton Elementary School District / 1,791 |
| 155. | 43.30 | Cooke City Elementary School District / 97 |
| 155. | 43.30 | Montana City Elementary School District / 2,963 |
| 157. | 43.40 | Deer Lodge Elementary School District / 5,818 |
| 158. | 43.50 | West Yellowstone K-12 School District / 1,769 |
| 158. | 43.50 | Whitefish High School District / 13,656 |
| 160. | 43.60 | Deer Creek Elementary School District / 1,684 |
| 161. | 43.70 | Blue Creek Elementary School District / 2,111 |
| 161. | 43.70 | Vaughn Elementary School District / 910 |
| 163. | 43.80 | Cottonwood Elementary School District / 358 |
| 163. | 43.80 | Fairfield High School District / 1,900 |
| 163. | 43.80 | Lambert Elementary School District / 385 |
| 166. | 43.90 | Columbus Elementary School District / 3,625 |
| 167. | 44.00 | Rau Elementary School District / 336 |
| 167. | 44.00 | Harlowton High School District / 1,899 |
| 167. | 44.00 | Boulder Elementary School District / 2,000 |
| 167. | 44.00 | Deep Creek Elementary School District / 114 |
| 167. | 44.00 | La Motte Elementary School District / 843 |
| 172. | 44.10 | Basin Elementary School District / 235 |
| 173. | 44.30 | Hawks Home Elementary School District / 107 |
| 173. | 44.30 | Valier Elementary School District / 981 |
| 173. | 44.30 | Lone Rock Elementary School District / 3,037 |
| 176. | 44.40 | Golden Ridge Elementary School District / 160 |
| 176. | 44.40 | Centerville High School District / 1,338 |
| 176. | 44.40 | Columbus High School District / 3,825 |
| 176. | 44.40 | Kila Elementary School District / 1,924 |
| 180. | 44.50 | Springdale Elementary School District / 131 |
| 180. | 44.50 | Centerville Elementary School District / 1,381 |
| 180. | 44.50 | Grant Elementary School District / 142 |
| 180. | 44.50 | Culbertson High School District / 917 |
| 180. | 44.50 | Park High School District / 12,795 |
| 180. | 44.50 | Florence-Carlton K-12 Schools / 5,328 |
| 180. | 44.50 | Willow Creek High School District / 275 |
| 180. | 44.50 | Deer Park Elementary School District / 1,000 |
| 180. | 44.50 | Gallatin Gateway Elementary School District / 1,565 |
| 189. | 44.60 | Paradise Elementary School District / 343 |
| 190. | 44.70 | Highwood High School District / 455 |
| 191. | 44.80 | Simms High School District / 3,030 |
| 191. | 44.80 | Willow Creek Elementary School District / 338 |
| 191. | 44.80 | Powell County High School District / 7,226 |
| 191. | 44.80 | Sand Springs Elementary School District / 90 |
| 195. | 44.90 | Chester-Joplin-Inverness High School District / 2,463 |
| 195. | 44.90 | Turner High School District / 303 |
| 195. | 44.90 | Canyon Creek Elementary School District / 1,921 |
| 198. | 45.00 | Turner Elementary School District / 306 |
| 199. | 45.10 | Zurich Elementary School District / 308 |
| 199. | 45.10 | Frontier Elementary School District / 430 |
| 199. | 45.10 | Cayuse Prairie Elementary School District / 2,440 |
| 199. | 45.10 | Culbertson Elementary School District / 1,022 |
| 199. | 45.10 | Polson Elementary School District / 9,949 |
| 204. | 45.20 | Jefferson High School District / 7,928 |
| 205. | 45.30 | Sun River Valley Elementary School District / 2,120 |
| 206. | 45.50 | Chinook Elementary School District / 1,888 |
| 206. | 45.50 | Jordan Elementary School District / 661 |
| 208. | 45.60 | Stevensville High School District / 9,662 |
| 208. | 45.60 | Chinook High School District / 2,333 |
| 208. | 45.60 | Conrad High School District / 3,640 |
| 211. | 45.70 | Big Sandy Elementary School District / 1,166 |
| 211. | 45.70 | Winifred K-12 Schools / 540 |
| 213. | 45.80 | Power Elementary School District / 454 |
| 213. | 45.80 | Highwood Elementary School District / 464 |
| 213. | 45.80 | Joliet High School District / 2,386 |
| 216. | 45.90 | Fair-Mont-Egan Elementary School District / 1,133 |
| 216. | 45.90 | Potomac Elementary School District / 1,075 |
| 216. | 45.90 | Anderson Elementary School District / 1,154 |
| 219. | 46.00 | Belt Elementary School District / 2,106 |
| 219. | 46.00 | Belt High School District / 2,008 |
| 219. | 46.00 | Dodson Elementary School District / 306 |
| 222. | 46.10 | Creston Elementary School District / 1,180 |
| 222. | 46.10 | Ulm Elementary School District / 726 |
| 222. | 46.10 | Ramsay Elementary School District / 1,265 |
| 225. | 46.20 | Anaconda Elementary School District / 9,023 |
| 225. | 46.20 | Conrad Elementary School District / 3,385 |
| 225. | 46.20 | Polson High School District / 11,105 |
| 225. | 46.20 | Raynesford Elementary School District / 142 |
| 225. | 46.20 | Power High School District / 484 |
| 230. | 46.30 | Joliet Elementary School District / 2,039 |
| 230. | 46.30 | Anaconda High School District / 9,099 |
| 230. | 46.30 | Stevensville Elementary School District / 6,625 |
| 230. | 46.30 | Moore High School District / 528 |
| 230. | 46.30 | Moore Elementary School District / 528 |
| 230. | 46.30 | Bynum Elementary School District / 224 |
| 230. | 46.30 | Choteau High School District / 3,118 |
| 237. | 46.40 | Garfield County High School District / 1,206 |
| 237. | 46.40 | Hall Elementary School District / 294 |
| 237. | 46.40 | Hinsdale Elementary School District / 407 |
| 237. | 46.40 | Townsend K-12 Schools / 5,046 |
| 241. | 46.50 | Camas Prairie Elementary School District / 172 |
| 241. | 46.50 | Brorson Elementary School District / 178 |
| 243. | 46.60 | Malta K-12 Schools / 3,211 |
| 243. | 46.60 | Roy K-12 Schools / 304 |
| 243. | 46.60 | Helmville Elementary School District / 218 |
| 243. | 46.60 | Sweet Grass County High School District / 3,559 |
| 247. | 46.70 | Cottonwood Elementary School District / 233 |
| 248. | 46.80 | Chester-Joplin-Inverness Elementary School District / 2,190 |
| 248. | 46.80 | Marion Elementary School District / 1,547 |
| 248. | 46.80 | Woodman Elementary School District / 451 |
| 251. | 46.90 | Roberts K-12 Schools / 890 |
| 251. | 46.90 | Olney-Bissell Elementary School District / 1,158 |
| 253. | 47.00 | Plevna K-12 Schools / 420 |
| 253. | 47.00 | Rapelje Elementary School District / 240 |
| 253. | 47.00 | Glasgow K-12 Schools / 4,951 |
| 253. | 47.00 | Big Timber Elementary School District / 2,697 |
| 253. | 47.00 | Hinsdale High School District / 446 |
| 258. | 47.10 | Pass Creek Elementary School District / 95 |
| 258. | 47.10 | Geyser High School District / 482 |
| 258. | 47.10 | Rapelje High School District / 343 |
| 261. | 47.20 | Trinity Elementary School District / 1,592 |
| 261. | 47.20 | Hamilton K-12 Schools / 11,122 |
| 263. | 47.30 | Forsyth Elementary School District / 2,525 |
| 263. | 47.30 | North Star High School District / 1,112 |
| 263. | 47.30 | Greenfield Elementary School District / 525 |
| 263. | 47.30 | Winnett K-12 Schools / 494 |
| 263. | 47.30 | Melstone High School District / 287 |
| 268. | 47.40 | Rosebud Elementary School District / 437 |
| 268. | 47.40 | Eureka Elementary School District / 4,902 |
| 268. | 47.40 | Forsyth High School District / 2,585 |
| 271. | 47.60 | Circle Elementary School District / 1,317 |
| 271. | 47.60 | Geyser Elementary School District / 340 |
| 271. | 47.60 | Sunset Elementary School District / 212 |
| 271. | 47.60 | Alberton K-12 Schools / 1,371 |
| 275. | 47.70 | Gardiner High School District / 1,457 |
| 275. | 47.70 | Lindsay Elementary School District / 338 |
| 275. | 47.70 | Choteau Elementary School District / 2,582 |
| 278. | 47.80 | Kircher Elementary School District / 797 |
| 278. | 47.80 | Bridger K-12 Schools / 1,304 |
| 278. | 47.80 | Fergus High School District / 9,002 |
| 278. | 47.80 | Gardiner Elementary School District / 1,360 |
| 282. | 47.90 | Avon Elementary School District / 239 |
| 282. | 47.90 | Dodson High School District / 350 |
| 282. | 47.90 | Rosebud High School District / 459 |
| 282. | 47.90 | Lewistown Elementary School District / 8,626 |
| 282. | 47.90 | Twin Bridges K-12 Schools / 1,491 |
| 282. | 47.90 | Lavina K-12 Schools / 379 |
| 288. | 48.00 | Luther Elementary School District / 395 |
| 288. | 48.00 | Carter Elementary School District / 168 |
| 290. | 48.10 | Clancy Elementary School District / 2,730 |
| 290. | 48.10 | Libby K-12 Schools / 9,844 |
| 290. | 48.10 | Fromberg K-12 Schools / 1,060 |
| 290. | 48.10 | Stanford K-12 Schools / 818 |
| 290. | 48.10 | Victor K-12 Schools / 3,486 |
| 295. | 48.30 | Denton High School District / 585 |
| 295. | 48.30 | Lincoln County High School District / 6,260 |
| 295. | 48.30 | Geraldine Elementary School District / 625 |
| 295. | 48.30 | King Colony Elementary School District / 323 |
| 299. | 48.40 | Cardwell Elementary School District / 409 |
| 300. | 48.50 | Reichle Elementary School District / 127 |
| 301. | 48.60 | Geraldine High School District / 647 |
| 302. | 48.70 | Saco High School District / 493 |
| 302. | 48.70 | Whitehall High School District / 3,913 |
| 302. | 48.70 | Judith Gap High School District / 336 |
| 302. | 48.70 | Judith Gap Elementary School District / 336 |
| 302. | 48.70 | Reedpoint High School District / 584 |
| 307. | 48.80 | Whitehall Elementary School District / 3,443 |
| 307. | 48.80 | Wisdom Elementary School District / 248 |
| 307. | 48.80 | Saco Elementary School District / 532 |
| 310. | 48.90 | Circle High School District / 1,734 |
| 310. | 48.90 | Galata Elementary School District / 263 |
| 310. | 48.90 | Swan River Elementary School District / 1,551 |
| 310. | 48.90 | Drummond High School District / 1,236 |
| 310. | 48.90 | Plains High School District / 3,425 |
| 315. | 49.00 | Roundup Elementary School District / 4,109 |
| 315. | 49.00 | Reedpoint Elementary School District / 648 |
| 315. | 49.00 | North Star Elementary School District / 966 |
| 315. | 49.00 | Ryegate K-12 Schools / 505 |
| 315. | 49.00 | Absarokee Elementary School District / 1,865 |
| 315. | 49.00 | Wibaux K-12 Schools / 1,017 |
| 321. | 49.10 | Dutton/Brady K-12 Schools / 981 |
| 322. | 49.20 | Westby K-12 Schools / 330 |
| 322. | 49.20 | Harrison K-12 Schools / 658 |
| 324. | 49.30 | Powder River County High School District / 1,759 |
| 324. | 49.30 | Roundup High School District / 4,246 |
| 324. | 49.30 | Plains Elementary School District / 3,082 |
| 327. | 49.40 | Target Range Elementary School District / 3,531 |
| 327. | 49.40 | Cascade High School District / 2,792 |
| 329. | 49.50 | Drummond Elementary School District / 942 |
| 329. | 49.50 | Noxon Elementary School District / 1,421 |
| 329. | 49.50 | Cottonwood Elementary School District / 108 |
| 329. | 49.50 | South Stacey Elementary School District / 97 |
| 329. | 49.50 | Belfry K-12 Schools / 610 |
| 334. | 49.60 | Fort Benton High School District / 2,296 |
| 334. | 49.60 | Augusta High School District / 814 |
| 336. | 49.70 | Red Lodge Elementary School District / 3,300 |
| 336. | 49.70 | Nashua K-12 Schools / 891 |
| 336. | 49.70 | St. Regis K-12 Schools / 1,247 |
| 339. | 49.80 | Ennis K-12 Schools / 3,482 |
| 339. | 49.80 | Red Lodge High School District / 3,828 |
| 339. | 49.80 | Broadus Elementary School District / 1,371 |
| 339. | 49.80 | Lima K-12 Schools / 508 |
| 339. | 49.80 | Benton Lake Elementary School District / 83 |
| 339. | 49.80 | Bear Paw Elementary School District / 137 |
| 345. | 50.00 | Twin Buttes Elementary School District / 82 |
| 345. | 50.00 | Denton Elementary School District / 527 |
| 345. | 50.00 | Birney Elementary School District / 102 |
| 345. | 50.00 | White Sulphur Springs Elementary School District / 1,766 |
| 349. | 50.10 | Scobey K-12 Schools / 1,603 |
| 349. | 50.10 | White Sulphur Springs High School District / 1,891 |
| 349. | 50.10 | Plentywood K-12 Schools / 2,434 |
| 352. | 50.20 | Shields Valley Elementary School District / 1,628 |
| 352. | 50.20 | Hobson K-12 Schools / 738 |
| 352. | 50.20 | Thompson Falls High School District / 3,556 |
| 352. | 50.20 | Melstone Elementary School District / 484 |
| 352. | 50.20 | Thompson Falls Elementary School District / 3,556 |
| 352. | 50.20 | Shields Valley High School District / 1,628 |
| 352. | 50.20 | Carter County High School District / 1,144 |
| 359. | 50.30 | Absarokee High School District / 2,302 |
| 359. | 50.30 | Richey Elementary School District / 417 |
| 361. | 50.40 | S H Elementary School District / 157 |
| 361. | 50.40 | Darby K-12 Schools / 4,042 |
| 361. | 50.40 | Arrowhead Elementary School District / 1,909 |
| 361. | 50.40 | Elliston Elementary School District / 339 |
| 365. | 50.50 | Ringling Elementary School District / 66 |
| 365. | 50.50 | Ekalaka Elementary School District / 878 |
| 367. | 50.60 | Grass Range High School District / 594 |
| 367. | 50.60 | McLeod Elementary School District / 223 |
| 367. | 50.60 | Trego Elementary School District / 588 |
| 367. | 50.60 | Cascade Elementary School District / 1,952 |
| 367. | 50.60 | Fishtail Elementary School District / 358 |
| 372. | 50.70 | Seeley Lake Elementary School District / 2,054 |
| 372. | 50.70 | Noxon High School District / 2,551 |
| 374. | 50.80 | Fort Benton Elementary School District / 1,890 |
| 374. | 50.80 | Biddle Elementary School District / 117 |
| 376. | 51.00 | Froid High School District / 430 |
| 376. | 51.00 | Troy Elementary School District / 2,850 |
| 376. | 51.00 | Sheridan Elementary School District / 1,381 |
| 376. | 51.00 | Superior K-12 Schools / 2,275 |
| 376. | 51.00 | Froid Elementary School District / 430 |
| 381. | 51.10 | Sheridan High School District / 1,673 |
| 382. | 51.20 | Bigfork High School District / 7,462 |
| 382. | 51.20 | Fortine Elementary School District / 770 |
| 384. | 51.40 | Custer K-12 Schools / 361 |
| 384. | 51.40 | Hot Springs High School District / 1,439 |
| 386. | 51.50 | Richey High School District / 487 |
| 386. | 51.50 | Hysham K-12 Schools / 718 |
| 386. | 51.50 | Springhill Elementary School District / 115 |
| 389. | 51.60 | Hot Springs Elementary School District / 1,267 |
| 390. | 51.70 | Bigfork Elementary School District / 5,747 |
| 390. | 51.70 | Garrison Elementary School District / 128 |
| 390. | 51.70 | Alder Elementary School District / 292 |
| 393. | 51.80 | Peerless K-12 Schools / 148 |
| 394. | 51.90 | Medicine Lake K-12 Schools / 620 |
| 395. | 52.10 | Troy High School District / 3,583 |
| 396. | 52.20 | Grass Range Elementary School District / 510 |
| 397. | 52.30 | Shawmut Elementary School District / 108 |
| 398. | 52.40 | Trout Creek Elementary School District / 1,130 |
| 399. | 52.50 | Alzada Elementary School District / 159 |
| 399. | 52.50 | Bloomfield Elementary School District / 104 |
| 401. | 53.50 | Big Dry Creek Elementary School District / 57 |
| 401. | 53.50 | Van Norman Elementary School District / 74 |
| 401. | 53.50 | Vida Elementary School District / 417 |
| 401. | 53.50 | Warrick Elementary School District / 28 |
| 401. | 53.50 | Lincoln K-12 Schools / 1,274 |
| 406. | 53.60 | Terry K-12 Schools / 1,179 |
| 407. | 53.70 | Divide Elementary School District / 180 |
| 407. | 53.70 | Augusta Elementary School District / 662 |
| 409. | 53.80 | West Glacier Elementary School District / 486 |
| 409. | 53.80 | Lennep Elementary School District / 59 |
| 409. | 53.80 | McCormick Elementary School District / 351 |
| 412. | 54.10 | Melrose Elementary School District / 115 |
| 413. | 54.40 | Wolf Creek Elementary School District / 612 |
| 414. | 54.50 | Philipsburg K-12 Schools / 1,843 |
| 414. | 54.50 | Cohagen Elementary School District / 102 |
| 416. | 54.70 | Opheim K-12 Schools / 338 |
| 417. | 55.10 | Swan Lake-Salmon Elementary School District / 353 |
| 418. | 55.40 | Upper West Shore Elementary School District / 903 |
| 419. | 55.50 | Wise River Elementary School District / 291 |
| 420. | 55.60 | Polaris Elementary School District / 97 |
| 421. | 56.00 | Landusky Elementary School District / 44 |
| 422. | 56.20 | Swan Valley Elementary School District / 551 |
| 423. | 57.00 | Sylvanite Elementary School District / 134 |
| 424. | 57.30 | Yaak Elementary School District / 248 |
| 425. | 57.40 | Nye Elementary School District / 212 |
| 426. | 57.80 | Ovando Elementary School District / 253 |
| 427. | 58.10 | Pine Creek Elementary School District / 357 |
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.
