| Rank | Median Age ▲ | School District / Population |
| 1. | 13.80 | Ross Elementary School District / 44 |
| 2. | 15.30 | Yellowstone Academy Elementary School District / 21 |
| 3. | 20.80 | Liberty Elementary School District / 76 |
| 4. | 21.10 | Lame Deer Elementary School District / 3,168 |
| 5. | 21.60 | Brockton High School District / 922 |
| 5. | 21.60 | Brockton Elementary School District / 922 |
| 7. | 22.40 | Auchard Creek Elementary School District / 143 |
| 8. | 23.90 | Lame Deer High School District / 5,339 |
| 9. | 24.10 | Harlem Elementary School District / 2,676 |
| 10. | 24.40 | Harlem High School District / 2,771 |
| 11. | 24.50 | Plenty Coups High School District / 961 |
| 11. | 24.50 | Pryor Elementary School District / 961 |
| 13. | 25.40 | Heart Butte K-12 Schools / 826 |
| 14. | 25.70 | Rocky Boy Elementary School District / 2,389 |
| 15. | 26.60 | Lodge Grass Elementary School District / 1,921 |
| 16. | 27.10 | Wolf Point Elementary School District / 3,715 |
| 17. | 27.20 | Rocky Boy High School District / 1,498 |
| 18. | 27.50 | Bozeman Elementary School District / 51,961 |
| 19. | 27.70 | East Glacier Park Elementary School District / 850 |
| 19. | 27.70 | Wolf Point High School District / 4,281 |
| 21. | 28.00 | Browning High School District / 8,960 |
| 21. | 28.00 | Browning Elementary School District / 8,110 |
| 23. | 28.50 | Bozeman High School District / 58,563 |
| 24. | 28.60 | Ashland Elementary School District / 1,156 |
| 25. | 29.50 | Lodge Grass High School District / 2,319 |
| 25. | 29.50 | Spring Creek Elementary School District / 78 |
| 27. | 29.80 | Greycliff Elementary School District / 284 |
| 28. | 30.10 | Poplar Elementary School District / 3,329 |
| 28. | 30.10 | Poplar High School District / 3,329 |
| 28. | 30.10 | Missoula Elementary School District / 70,583 |
| 31. | 30.40 | Molt Elementary School District / 184 |
| 32. | 31.50 | Belgrade Elementary School District / 19,573 |
| 33. | 31.70 | Belgrade High School District / 19,773 |
| 34. | 32.00 | Missoula High School District / 97,049 |
| 35. | 32.80 | North Harlem Colony Elementary School District / 41 |
| 36. | 33.10 | Ronan High School District / 8,304 |
| 36. | 33.10 | Hardin High School District / 8,013 |
| 36. | 33.10 | Ronan Elementary School District / 8,304 |
| 39. | 33.20 | Springdale Elementary School District / 165 |
| 39. | 33.20 | Gildford Colony Elementary School District / 110 |
| 41. | 33.40 | Charlo Elementary School District / 1,342 |
| 42. | 33.70 | Pendroy Elementary School District / 334 |
| 43. | 33.90 | Twin Buttes Elementary School District / 83 |
| 44. | 34.00 | Hardin Elementary School District / 8,993 |
| 45. | 34.30 | Havre Elementary School District / 12,764 |
| 46. | 34.50 | Lockwood Elementary School District / 7,389 |
| 47. | 34.60 | Havre High School District / 13,197 |
| 48. | 34.80 | Valley View Elementary School District / 427 |
| 49. | 34.90 | Melville Elementary School District / 242 |
| 50. | 35.00 | Hellgate Elementary School District / 10,647 |
| 51. | 35.30 | Arlee Elementary School District / 2,377 |
| 51. | 35.30 | Arlee High School District / 2,377 |
| 53. | 35.40 | Lolo Elementary School District / 3,934 |
| 53. | 35.40 | St. Ignatius K-12 Schools / 3,138 |
| 55. | 35.70 | Denton Elementary School District / 664 |
| 55. | 35.70 | West Glacier Elementary School District / 411 |
| 57. | 35.80 | Columbia Falls Elementary School District / 13,994 |
| 57. | 35.80 | De Smet Elementary School District / 580 |
| 57. | 35.80 | Columbia Falls High School District / 14,405 |
| 57. | 35.80 | Denton High School District / 671 |
| 61. | 36.20 | Charlo High School District / 1,976 |
| 61. | 36.20 | Lavina K-12 Schools / 532 |
| 63. | 36.30 | Reichle Elementary School District / 116 |
| 63. | 36.30 | Golden Ridge Elementary School District / 180 |
| 65. | 36.50 | Bonner Elementary School District / 2,365 |
| 65. | 36.50 | Laurel Elementary School District / 10,532 |
| 67. | 36.60 | Laurel High School District / 10,015 |
| 68. | 36.70 | Big Sandy High School District / 2,034 |
| 69. | 36.80 | Kalispell Elementary School District / 28,562 |
| 69. | 36.80 | Hays-Lodge Pole K-12 Schools / 1,016 |
| 71. | 37.10 | Great Falls Elementary School District / 72,584 |
| 71. | 37.10 | Smith Valley Elementary School District / 1,761 |
| 73. | 37.20 | Morin Elementary School District / 533 |
| 73. | 37.20 | Great Falls High School District / 72,659 |
| 75. | 37.30 | Frontier Elementary School District / 566 |
| 75. | 37.30 | Billings Elementary School District / 104,681 |
| 77. | 37.40 | Gold Creek Elementary School District / 221 |
| 78. | 37.50 | Swan River Elementary School District / 1,685 |
| 78. | 37.50 | Billings High School District / 122,509 |
| 78. | 37.50 | Lambert High School District / 384 |
| 81. | 37.80 | Cut Bank Elementary School District / 4,451 |
| 81. | 37.80 | Dixon Elementary School District / 634 |
| 81. | 37.80 | Cut Bank High School District / 4,451 |
| 84. | 37.90 | Independent Elementary School District / 2,555 |
| 85. | 38.00 | Frazer Elementary School District / 424 |
| 86. | 38.10 | Name N/A / 852,731 |
| 87. | 38.20 | Ringling Elementary School District / 94 |
| 88. | 38.30 | Evergreen Elementary School District / 5,740 |
| 89. | 38.40 | Eureka Elementary School District / 4,157 |
| 90. | 38.50 | East Helena Elementary School District / 8,387 |
| 91. | 38.60 | South Stacey Elementary School District / 113 |
| 91. | 38.60 | Dillon Elementary School District / 7,428 |
| 93. | 38.80 | Shepherd Elementary School District / 2,920 |
| 93. | 38.80 | Shepherd High School District / 2,920 |
| 95. | 39.00 | Manhattan Elementary School District / 2,523 |
| 96. | 39.10 | Box Elder High School District / 335 |
| 96. | 39.10 | Monforton Elementary School District / 1,807 |
| 96. | 39.10 | Box Elder Elementary School District / 335 |
| 99. | 39.20 | Melstone High School District / 424 |
| 99. | 39.20 | Corvallis K-12 Schools / 7,291 |
| 101. | 39.30 | Fair-Mont-Egan Elementary School District / 1,130 |
| 102. | 39.50 | Elliston Elementary School District / 291 |
| 103. | 39.60 | Flathead High School District / 52,794 |
| 103. | 39.60 | Frazer High School District / 586 |
| 105. | 39.70 | La Motte Elementary School District / 734 |
| 106. | 39.80 | Avon Elementary School District / 177 |
| 107. | 39.90 | Lincoln County High School District / 5,421 |
| 107. | 39.90 | Helena Elementary School District / 48,201 |
| 107. | 39.90 | Florence-Carlton K-12 Schools / 5,688 |
| 107. | 39.90 | Power Elementary School District / 520 |
| 111. | 40.00 | Twin Bridges K-12 Schools / 1,351 |
| 112. | 40.10 | Helena High School District / 58,464 |
| 112. | 40.10 | Rau Elementary School District / 271 |
| 112. | 40.10 | Manhattan High School District / 3,940 |
| 112. | 40.10 | Ophir Elementary School District / 1,074 |
| 116. | 40.20 | Roy K-12 Schools / 348 |
| 117. | 40.30 | Townsend K-12 Schools / 4,335 |
| 117. | 40.30 | Helena Flats Elementary School District / 1,534 |
| 119. | 40.40 | Blue Creek Elementary School District / 2,190 |
| 119. | 40.40 | Hysham K-12 Schools / 912 |
| 121. | 40.50 | Shelby Elementary School District / 3,521 |
| 121. | 40.50 | Jackson Elementary School District / 171 |
| 121. | 40.50 | Deer Creek Elementary School District / 1,622 |
| 121. | 40.50 | Trail Creek Elementary School District / 64 |
| 125. | 40.60 | Gallatin Gateway Elementary School District / 1,489 |
| 125. | 40.60 | Amsterdam Elementary School District / 1,390 |
| 127. | 40.80 | Creston Elementary School District / 1,060 |
| 127. | 40.80 | S Y Elementary School District / 78 |
| 129. | 41.00 | Fairview High School District / 1,413 |
| 129. | 41.00 | Bear Paw Elementary School District / 122 |
| 129. | 41.00 | Fairview Elementary School District / 1,403 |
| 132. | 41.10 | Lambert Elementary School District / 407 |
| 132. | 41.10 | Woodman Elementary School District / 580 |
| 134. | 41.20 | Sunburst K-12 Schools / 1,300 |
| 134. | 41.20 | Butte Elementary School District / 31,449 |
| 134. | 41.20 | Colstrip Elementary School District / 2,351 |
| 134. | 41.20 | Beaverhead County High School District / 8,478 |
| 134. | 41.20 | Belt High School District / 2,020 |
| 134. | 41.20 | Gardiner Elementary School District / 1,710 |
| 134. | 41.20 | Colstrip High School District / 2,351 |
| 141. | 41.30 | Shelby High School District / 3,810 |
| 142. | 41.40 | Boulder Elementary School District / 2,428 |
| 142. | 41.40 | Ulm Elementary School District / 753 |
| 142. | 41.40 | Broadview High School District / 937 |
| 142. | 41.40 | Butte High School District / 32,714 |
| 146. | 41.60 | Miles City Elementary School District / 9,488 |
| 147. | 41.70 | Gardiner High School District / 1,787 |
| 147. | 41.70 | Cardwell Elementary School District / 481 |
| 149. | 41.90 | Malmborg Elementary School District / 133 |
| 149. | 41.90 | West Yellowstone K-12 School District / 1,493 |
| 151. | 42.00 | Deer Lodge Elementary School District / 5,878 |
| 152. | 42.10 | Dawson High School District / 8,074 |
| 152. | 42.10 | Park City Elementary School District / 2,206 |
| 152. | 42.10 | Whitefish Elementary School District / 14,029 |
| 155. | 42.20 | Whitefish High School District / 14,617 |
| 155. | 42.20 | Livingston Elementary School District / 10,306 |
| 155. | 42.20 | Park City High School District / 2,065 |
| 155. | 42.20 | Fairfield High School District / 1,888 |
| 155. | 42.20 | Belt Elementary School District / 2,043 |
| 155. | 42.20 | Glendive Elementary School District / 6,042 |
| 155. | 42.20 | Custer County High School District / 11,129 |
| 162. | 42.30 | Elysian Elementary School District / 488 |
| 162. | 42.30 | Fairfield Elementary School District / 1,115 |
| 162. | 42.30 | Power High School District / 525 |
| 165. | 42.40 | Broadview Elementary School District / 871 |
| 166. | 42.50 | Knees Elementary School District / 108 |
| 166. | 42.50 | West Valley Elementary School District / 2,822 |
| 166. | 42.50 | Canyon Creek Elementary School District / 1,807 |
| 169. | 42.60 | Shawmut Elementary School District / 103 |
| 169. | 42.60 | Name N/A / 842 |
| 171. | 42.70 | Broadus Elementary School District / 1,363 |
| 171. | 42.70 | Victor K-12 Schools / 3,644 |
| 171. | 42.70 | Cayuse Prairie Elementary School District / 2,511 |
| 171. | 42.70 | Powell County High School District / 7,151 |
| 171. | 42.70 | Park High School District / 12,686 |
| 176. | 42.80 | Frenchtown K-12 Schools / 5,970 |
| 176. | 42.80 | Sidney Elementary School District / 6,244 |
| 178. | 42.90 | Columbus High School District / 3,493 |
| 179. | 43.00 | Pine Grove Elementary School District / 100 |
| 179. | 43.00 | Pioneer Elementary School District / 792 |
| 179. | 43.00 | Vaughn Elementary School District / 1,040 |
| 179. | 43.00 | Drummond Elementary School District / 948 |
| 183. | 43.10 | White Sulphur Springs High School District / 1,628 |
| 183. | 43.10 | Columbus Elementary School District / 3,352 |
| 183. | 43.10 | Powder River County High School District / 1,691 |
| 183. | 43.10 | Circle Elementary School District / 1,213 |
| 187. | 43.20 | Sand Springs Elementary School District / 85 |
| 187. | 43.20 | Target Range Elementary School District / 3,277 |
| 187. | 43.20 | Whitewater K-12 Schools / 143 |
| 190. | 43.30 | Harrison K-12 Schools / 927 |
| 190. | 43.30 | Sidney High School District / 6,811 |
| 190. | 43.30 | Hinsdale Elementary School District / 382 |
| 190. | 43.30 | Seeley Lake Elementary School District / 1,614 |
| 190. | 43.30 | Culbertson Elementary School District / 1,019 |
| 190. | 43.30 | Montana City Elementary School District / 2,543 |
| 190. | 43.30 | Huntley Project K-12 Schools / 3,750 |
| 197. | 43.40 | Conrad Elementary School District / 3,221 |
| 198. | 43.50 | Conrad High School District / 3,333 |
| 198. | 43.50 | Potomac Elementary School District / 1,138 |
| 198. | 43.50 | Olney-Bissell Elementary School District / 927 |
| 201. | 43.60 | White Sulphur Springs Elementary School District / 1,482 |
| 201. | 43.60 | Greenfield Elementary School District / 598 |
| 203. | 43.70 | Chester-Joplin-Inverness High School District / 2,290 |
| 203. | 43.70 | Drummond High School District / 1,207 |
| 203. | 43.70 | Winifred K-12 Schools / 489 |
| 203. | 43.70 | Cottonwood Elementary School District / 149 |
| 207. | 43.80 | Culbertson High School District / 921 |
| 207. | 43.80 | Chester-Joplin-Inverness Elementary School District / 2,185 |
| 209. | 43.90 | Cottonwood Elementary School District / 356 |
| 209. | 43.90 | Whitehall High School District / 3,725 |
| 209. | 43.90 | Stevensville Elementary School District / 6,627 |
| 212. | 44.00 | Reedpoint High School District / 501 |
| 213. | 44.10 | Pleasant Valley Elementary School District / 103 |
| 213. | 44.10 | Savage High School District / 520 |
| 213. | 44.10 | Dupuyer Elementary School District / 309 |
| 216. | 44.20 | Stevensville High School District / 9,879 |
| 216. | 44.20 | Bainville K-12 Schools / 335 |
| 216. | 44.20 | Elder Grove Elementary School District / 2,053 |
| 216. | 44.20 | Chinook Elementary School District / 2,022 |
| 220. | 44.30 | Warrick Elementary School District / 22 |
| 220. | 44.30 | Anderson Elementary School District / 1,129 |
| 220. | 44.30 | Baker K-12 Schools / 2,302 |
| 220. | 44.30 | Hawks Home Elementary School District / 119 |
| 220. | 44.30 | Three Forks Elementary School District / 2,639 |
| 225. | 44.40 | Kircher Elementary School District / 728 |
| 225. | 44.40 | Jefferson High School District / 7,804 |
| 227. | 44.50 | Medicine Lake K-12 Schools / 723 |
| 227. | 44.50 | Valier High School District / 1,417 |
| 227. | 44.50 | Three Forks High School District / 2,592 |
| 227. | 44.50 | Geraldine High School District / 713 |
| 231. | 44.60 | Kinsey Elementary School District / 416 |
| 232. | 44.70 | Chinook High School District / 2,407 |
| 232. | 44.70 | Alberton K-12 Schools / 1,100 |
| 232. | 44.70 | Whitehall Elementary School District / 3,168 |
| 235. | 44.80 | Valier Elementary School District / 1,108 |
| 235. | 44.80 | Arrowhead Elementary School District / 1,852 |
| 237. | 44.90 | Simms High School District / 3,100 |
| 237. | 44.90 | Hinsdale High School District / 418 |
| 237. | 44.90 | Red Lodge Elementary School District / 3,445 |
| 237. | 44.90 | Noxon Elementary School District / 1,313 |
| 237. | 44.90 | Geraldine Elementary School District / 652 |
| 237. | 44.90 | Anaconda Elementary School District / 8,737 |
| 243. | 45.00 | Anaconda High School District / 8,782 |
| 243. | 45.00 | Wyola Elementary School District / 398 |
| 245. | 45.10 | Helmville Elementary School District / 230 |
| 245. | 45.10 | Ramsay Elementary School District / 1,040 |
| 245. | 45.10 | Kila Elementary School District / 1,231 |
| 248. | 45.20 | Lindsay Elementary School District / 387 |
| 248. | 45.20 | Basin Elementary School District / 264 |
| 250. | 45.30 | Clinton Elementary School District / 1,666 |
| 251. | 45.40 | Fromberg K-12 Schools / 1,105 |
| 251. | 45.40 | Red Lodge High School District / 4,012 |
| 251. | 45.40 | Plevna K-12 Schools / 355 |
| 254. | 45.50 | Luther Elementary School District / 441 |
| 254. | 45.50 | Winnett K-12 Schools / 512 |
| 254. | 45.50 | Savage Elementary School District / 499 |
| 257. | 45.60 | Polson Elementary School District / 9,518 |
| 258. | 45.70 | Glasgow K-12 Schools / 4,534 |
| 258. | 45.70 | Dodson Elementary School District / 276 |
| 258. | 45.70 | Highwood Elementary School District / 540 |
| 258. | 45.70 | Lone Rock Elementary School District / 3,252 |
| 258. | 45.70 | Sun River Valley Elementary School District / 2,060 |
| 258. | 45.70 | Cottonwood Elementary School District / 236 |
| 264. | 45.80 | Garfield County High School District / 1,135 |
| 264. | 45.80 | Melstone Elementary School District / 619 |
| 264. | 45.80 | Roberts K-12 Schools / 688 |
| 267. | 45.90 | Joliet High School District / 2,178 |
| 267. | 45.90 | Ayers Elementary School District / 15 |
| 267. | 45.90 | Circle High School District / 1,747 |
| 270. | 46.10 | North Star High School District / 1,214 |
| 270. | 46.10 | Plains Elementary School District / 2,960 |
| 270. | 46.10 | Camas Prairie Elementary School District / 249 |
| 270. | 46.10 | Miami Elementary School District / 112 |
| 274. | 46.20 | Dodson High School District / 331 |
| 275. | 46.30 | Polson High School District / 10,702 |
| 275. | 46.30 | Jordan Elementary School District / 640 |
| 275. | 46.30 | Choteau High School District / 3,107 |
| 278. | 46.40 | Trego Elementary School District / 660 |
| 279. | 46.50 | Hall Elementary School District / 259 |
| 279. | 46.50 | Superior K-12 Schools / 2,370 |
| 281. | 46.60 | St. Regis K-12 Schools / 1,055 |
| 281. | 46.60 | Centerville Elementary School District / 1,526 |
| 281. | 46.60 | Somers Elementary School District / 4,396 |
| 284. | 46.70 | Forsyth Elementary School District / 2,497 |
| 285. | 46.80 | Brorson Elementary School District / 222 |
| 285. | 46.80 | Forsyth High School District / 2,531 |
| 285. | 46.80 | Plains High School District / 3,352 |
| 288. | 46.90 | Sweet Grass County High School District / 3,567 |
| 288. | 46.90 | Benton Lake Elementary School District / 47 |
| 290. | 47.00 | Willow Creek Elementary School District / 212 |
| 290. | 47.00 | Fortine Elementary School District / 604 |
| 290. | 47.00 | Kester Elementary School District / 38 |
| 293. | 47.10 | North Star Elementary School District / 1,082 |
| 294. | 47.20 | Choteau Elementary School District / 2,612 |
| 294. | 47.20 | Centerville High School District / 1,474 |
| 296. | 47.30 | Lewistown Elementary School District / 8,714 |
| 296. | 47.30 | Hamilton K-12 Schools / 11,767 |
| 296. | 47.30 | Highwood High School District / 482 |
| 299. | 47.40 | Bridger K-12 Schools / 1,205 |
| 300. | 47.50 | Saco High School District / 388 |
| 300. | 47.50 | Fergus High School District / 8,858 |
| 302. | 47.60 | Big Timber Elementary School District / 2,819 |
| 303. | 47.70 | Rapelje High School District / 351 |
| 304. | 47.80 | Wibaux K-12 Schools / 922 |
| 304. | 47.80 | Absarokee Elementary School District / 1,841 |
| 306. | 47.90 | Lustre Elementary School District / 162 |
| 306. | 47.90 | Wolf Creek Elementary School District / 407 |
| 306. | 47.90 | Noxon High School District / 2,229 |
| 309. | 48.00 | Shields Valley High School District / 1,731 |
| 309. | 48.00 | Clancy Elementary School District / 2,569 |
| 309. | 48.00 | Shields Valley Elementary School District / 1,731 |
| 309. | 48.00 | Pass Creek Elementary School District / 82 |
| 309. | 48.00 | Scobey K-12 Schools / 1,346 |
| 314. | 48.10 | Westby K-12 Schools / 358 |
| 314. | 48.10 | Opheim K-12 Schools / 415 |
| 314. | 48.10 | Spring Creek Elementary School District / 86 |
| 317. | 48.30 | Wisdom Elementary School District / 283 |
| 317. | 48.30 | Bigfork High School District / 7,893 |
| 319. | 48.40 | Deep Creek Elementary School District / 149 |
| 319. | 48.40 | Augusta High School District / 639 |
| 321. | 48.50 | Libby K-12 Schools / 10,055 |
| 321. | 48.50 | Roundup Elementary School District / 3,797 |
| 323. | 48.60 | Roundup High School District / 3,958 |
| 323. | 48.60 | Malta K-12 Schools / 3,097 |
| 323. | 48.60 | Big Sandy Elementary School District / 1,121 |
| 323. | 48.60 | Saco Elementary School District / 424 |
| 327. | 48.70 | Darby K-12 Schools / 3,077 |
| 328. | 48.80 | McLeod Elementary School District / 170 |
| 328. | 48.80 | King Colony Elementary School District / 140 |
| 328. | 48.80 | Reedpoint Elementary School District / 549 |
| 328. | 48.80 | Ennis K-12 Schools / 2,563 |
| 332. | 48.90 | Alder Elementary School District / 292 |
| 333. | 49.00 | Cooke City Elementary School District / 77 |
| 334. | 49.10 | Bigfork Elementary School District / 6,078 |
| 334. | 49.10 | Cascade High School District / 2,659 |
| 336. | 49.20 | Absarokee High School District / 2,256 |
| 337. | 49.30 | Divide Elementary School District / 138 |
| 337. | 49.30 | Troy Elementary School District / 2,612 |
| 339. | 49.40 | Paradise Elementary School District / 392 |
| 339. | 49.40 | Trinity Elementary School District / 1,242 |
| 339. | 49.40 | Bloomfield Elementary School District / 99 |
| 339. | 49.40 | Willow Creek High School District / 169 |
| 343. | 49.50 | Rapelje Elementary School District / 233 |
| 344. | 49.60 | Moore High School District / 387 |
| 344. | 49.60 | Moore Elementary School District / 387 |
| 344. | 49.60 | Nashua K-12 Schools / 935 |
| 347. | 49.70 | Judith Gap Elementary School District / 302 |
| 347. | 49.70 | Sunset Elementary School District / 174 |
| 347. | 49.70 | Name N/A / 300 |
| 347. | 49.70 | Judith Gap High School District / 302 |
| 351. | 49.80 | Lima K-12 Schools / 409 |
| 351. | 49.80 | Bynum Elementary School District / 161 |
| 351. | 49.80 | Thompson Falls High School District / 3,096 |
| 351. | 49.80 | Richey High School District / 473 |
| 351. | 49.80 | Thompson Falls Elementary School District / 3,096 |
| 356. | 50.00 | Lincoln K-12 Schools / 978 |
| 357. | 50.10 | Davey Elementary School District / 99 |
| 357. | 50.10 | Turner Elementary School District / 312 |
| 357. | 50.10 | Richey Elementary School District / 381 |
| 357. | 50.10 | Trout Creek Elementary School District / 916 |
| 361. | 50.30 | Deer Park Elementary School District / 765 |
| 361. | 50.30 | Garrison Elementary School District / 146 |
| 361. | 50.30 | Joliet Elementary School District / 1,624 |
| 364. | 50.40 | Grass Range High School District / 420 |
| 364. | 50.40 | Harlowton High School District / 1,772 |
| 366. | 50.50 | Turner High School District / 321 |
| 367. | 50.60 | Vida Elementary School District / 534 |
| 367. | 50.60 | Hobson K-12 Schools / 875 |
| 367. | 50.60 | Dutton/Brady K-12 Schools / 945 |
| 370. | 50.80 | Hot Springs High School District / 1,668 |
| 371. | 50.90 | Sheridan High School District / 2,075 |
| 372. | 51.00 | Marion Elementary School District / 840 |
| 372. | 51.00 | Sheridan Elementary School District / 1,783 |
| 372. | 51.00 | Grass Range Elementary School District / 405 |
| 372. | 51.00 | Cascade Elementary School District / 1,757 |
| 376. | 51.20 | Plentywood K-12 Schools / 2,487 |
| 377. | 51.30 | Harlowton Elementary School District / 1,669 |
| 377. | 51.30 | Troy High School District / 3,222 |
| 379. | 51.40 | Zurich Elementary School District / 263 |
| 380. | 51.50 | Fort Benton High School District / 1,994 |
| 381. | 51.60 | Hot Springs Elementary School District / 1,419 |
| 381. | 51.60 | Carter County High School District / 1,237 |
| 381. | 51.60 | Landusky Elementary School District / 55 |
| 381. | 51.60 | Custer K-12 Schools / 400 |
| 385. | 51.80 | Ekalaka Elementary School District / 958 |
| 385. | 51.80 | Fishtail Elementary School District / 366 |
| 387. | 51.90 | Philipsburg K-12 Schools / 1,673 |
| 388. | 52.20 | Augusta Elementary School District / 496 |
| 388. | 52.20 | Belfry K-12 Schools / 553 |
| 390. | 52.30 | Fort Benton Elementary School District / 1,699 |
| 390. | 52.30 | Van Norman Elementary School District / 108 |
| 392. | 52.60 | McCormick Elementary School District / 344 |
| 393. | 52.70 | Polaris Elementary School District / 118 |
| 394. | 53.20 | Cleveland Elementary School District / 63 |
| 395. | 53.50 | Lennep Elementary School District / 52 |
| 395. | 53.50 | Grant Elementary School District / 113 |
| 397. | 53.80 | Ryegate K-12 Schools / 341 |
| 398. | 53.90 | Geyser Elementary School District / 202 |
| 399. | 54.00 | Swan Lake-Salmon Elementary School District / 218 |
| 400. | 54.20 | Galata Elementary School District / 289 |
| 401. | 54.90 | Carter Elementary School District / 143 |
| 402. | 55.10 | Springhill Elementary School District / 131 |
| 402. | 55.10 | Birney Elementary School District / 73 |
| 404. | 55.30 | Alzada Elementary School District / 160 |
| 405. | 55.50 | Rosebud High School District / 398 |
| 406. | 55.60 | Wise River Elementary School District / 294 |
| 406. | 55.60 | Stanford K-12 Schools / 857 |
| 408. | 55.80 | S H Elementary School District / 121 |
| 409. | 55.90 | Terry K-12 Schools / 1,004 |
| 410. | 56.00 | Pine Creek Elementary School District / 367 |
| 411. | 56.10 | Peerless K-12 Schools / 137 |
| 411. | 56.10 | Swan Valley Elementary School District / 403 |
| 411. | 56.10 | Geyser High School District / 334 |
| 414. | 56.40 | Rosebud Elementary School District / 375 |
| 415. | 56.50 | Spring Creek Colony Elementary School District / 4 |
| 416. | 56.90 | Yaak Elementary School District / 148 |
| 417. | 57.10 | Nye Elementary School District / 175 |
| 418. | 57.20 | Upper West Shore Elementary School District / 757 |
| 419. | 57.40 | Big Dry Creek Elementary School District / 33 |
| 420. | 57.50 | Raynesford Elementary School District / 132 |
| 420. | 57.50 | Sylvanite Elementary School District / 118 |
| 422. | 58.20 | Froid Elementary School District / 443 |
| 422. | 58.20 | Froid High School District / 443 |
| 424. | 58.30 | Biddle Elementary School District / 70 |
| 425. | 58.40 | Cohagen Elementary School District / 55 |
| 426. | 60.20 | Name N/A / 227 |
| 427. | 61.40 | Ovando Elementary School District / 208 |
| 428. | 67.30 | Whitlash Elementary School District / 29 |
| 429. | 67.80 | Melrose Elementary School District / 87 |
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.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
