| Rank | Median Age ▲ | School District / Population |
| 1. | 25.60 | Fountain School District 8 / 31,924 |
| 2. | 27.90 | Harrison School District 2 / 71,425 |
| 3. | 29.50 | Vilas School District RE-5 / 258 |
| 4. | 29.80 | Adams County School District 14 / 37,442 |
| 5. | 29.90 | Greeley School District 6 / 115,684 |
| 6. | 30.90 | Alamosa School District RE-11J / 14,499 |
| 7. | 31.50 | Adams-Arapahoe School District 28J / 209,766 |
| 8. | 31.80 | Widefield School District 3 / 45,898 |
| 9. | 32.10 | Sheridan School District 2 / 8,517 |
| 9. | 32.10 | Poudre School District R-1 / 185,494 |
| 11. | 32.30 | Falcon School District 49 / 74,250 |
| 12. | 32.80 | Brighton School District 27J / 76,145 |
| 13. | 33.00 | Mapleton School District 1 / 29,604 |
| 14. | 33.10 | Fort Morgan School District RE-3 / 17,004 |
| 14. | 33.10 | Rangely School District RE-4 / 3,239 |
| 14. | 33.10 | Bethune School District R-5 / 592 |
| 14. | 33.10 | Johnstown-Milliken School District RE-5J / 16,419 |
| 18. | 33.40 | Garfield School District RE-2 / 23,824 |
| 19. | 33.60 | Northglenn-Thornton School District 12 / 210,396 |
| 20. | 33.70 | Westminster School District 50 / 71,524 |
| 20. | 33.70 | Denver County School District 1 / 604,356 |
| 22. | 33.80 | Idalia School District RJ-3 / 666 |
| 23. | 34.00 | Keenesburg School District RE-3J / 12,217 |
| 23. | 34.00 | Strasburg School District 31J / 5,163 |
| 25. | 34.10 | Eagle County School District RE 50 / 42,995 |
| 26. | 34.20 | Gunnison Watershed School District RE-1J / 15,226 |
| 26. | 34.20 | Lake County School District R-1 / 7,372 |
| 28. | 34.70 | Center School District 26-JT / 3,455 |
| 29. | 34.80 | Boulder Valley School District RE-2 / 214,867 |
| 30. | 34.90 | Garfield County School District 16 / 6,527 |
| 31. | 35.10 | Weld County School District RE-8 / 12,393 |
| 32. | 35.40 | Academy School District 20 / 98,212 |
| 33. | 35.50 | Plainview School District RE-2 / 314 |
| 33. | 35.50 | Lamar School District RE-2 / 9,554 |
| 35. | 35.60 | Roaring Fork School District RE-1 / 39,102 |
| 36. | 35.70 | Windsor School District RE-4 / 21,180 |
| 36. | 35.70 | Wray School District RD-2 / 3,826 |
| 38. | 35.80 | Cherry Creek School District 5 / 271,809 |
| 39. | 36.20 | Hanover School District 28 / 2,077 |
| 40. | 36.30 | Summit School District RE-1 / 27,651 |
| 41. | 36.40 | Moffat County School District RE-1 / 13,547 |
| 41. | 36.40 | Swink School District 33 / 1,582 |
| 41. | 36.40 | Holyoke School District RE-1J / 2,986 |
| 44. | 36.60 | Limon School District RE-4J / 3,644 |
| 44. | 36.60 | Woodlin School District R-104 / 362 |
| 46. | 36.70 | Douglas County School District RE-1 / 289,396 |
| 46. | 36.70 | Durango School District 9-R / 38,689 |
| 46. | 36.70 | St. Vrain Valley School District RE 1J / 152,230 |
| 46. | 36.70 | Colorado Springs School District 11 / 226,571 |
| 46. | 36.70 | Yuma School District 1 / 4,982 |
| 51. | 36.80 | Peyton School District 23-JT / 3,727 |
| 51. | 36.80 | Valley School District RE-1 / 19,956 |
| 53. | 37.00 | Ignacio School District 11-JT / 5,917 |
| 54. | 37.30 | West Grand School District 1-JT / 3,568 |
| 54. | 37.30 | Wiggins School District RE-50J / 2,477 |
| 56. | 37.50 | Prairie School District RE-11 / 540 |
| 56. | 37.50 | De Beque School District 49-JT / 734 |
| 58. | 37.70 | Telluride School District R-1 / 5,842 |
| 59. | 37.80 | North Conejos School District RE-1J / 4,725 |
| 59. | 37.80 | Mesa County Valley School District 51 / 143,522 |
| 59. | 37.80 | Englewood School District 1 / 25,174 |
| 59. | 37.80 | Pueblo City School District 60 / 109,446 |
| 63. | 37.90 | Silverton School District 1 / 747 |
| 64. | 38.00 | Monte Vista School District C-8 / 6,521 |
| 65. | 38.10 | Burlington School District RE-6J / 5,251 |
| 66. | 38.50 | Weld County School District RE-1 / 9,639 |
| 66. | 38.50 | Sanford School District 6J / 1,434 |
| 68. | 38.90 | Steamboat Springs School District RE-2 / 17,018 |
| 68. | 38.90 | Edison School District 54-JT / 285 |
| 70. | 39.10 | Liberty School District J-4 / 602 |
| 70. | 39.10 | Ellicott School District 22 / 4,033 |
| 72. | 39.20 | Ault-Highland School District RE-9 / 5,659 |
| 72. | 39.20 | Eaton School District RE-2 / 9,077 |
| 74. | 39.30 | Crowley County School District RE-1-J / 5,306 |
| 75. | 39.40 | Miami-Yoder School District 60-JT / 1,932 |
| 75. | 39.40 | Kit Carson School District R-1 / 636 |
| 75. | 39.40 | Platte Valley School District RE-7 / 4,734 |
| 78. | 39.50 | Hoehne Reorganized School District 3 / 2,206 |
| 79. | 39.70 | Sargent School District RE-33J / 1,056 |
| 80. | 39.80 | Brush School District RE-2J / 8,117 |
| 80. | 39.80 | Cheraw School District 31 / 636 |
| 82. | 40.00 | Florence School District RE-2 / 16,521 |
| 83. | 40.10 | Thompson School District R-2J / 104,727 |
| 84. | 40.20 | Hayden School District RE-1 / 3,010 |
| 84. | 40.20 | Stratton School District R-4 / 1,055 |
| 84. | 40.20 | Jefferson County School District R-1 / 538,708 |
| 84. | 40.20 | Bennett School District 29-J / 5,684 |
| 84. | 40.20 | Deer Trail School District 26J / 632 |
| 89. | 40.30 | Pawnee School District RE-12 / 539 |
| 89. | 40.30 | South Routt School District RE-3 / 3,238 |
| 91. | 40.40 | Las Animas School District RE-1 / 5,268 |
| 91. | 40.40 | East Otero School District R-1 / 8,558 |
| 91. | 40.40 | Granada School District RE-1 / 1,073 |
| 94. | 40.50 | Montezuma-Cortez School District RE-1 / 18,417 |
| 95. | 40.70 | Meeker School District RE1 / 3,489 |
| 96. | 40.80 | Pueblo County School District 70 / 49,398 |
| 97. | 41.00 | Byers School District 32J / 2,375 |
| 97. | 41.00 | Elbert School District 200 / 1,674 |
| 99. | 41.10 | Wiley School District RE-13-JT / 848 |
| 100. | 41.50 | Manzanola School District 3J / 1,093 |
| 100. | 41.50 | Buffalo School District RE-4 / 915 |
| 102. | 41.70 | Eads School District RE-1 / 1,079 |
| 103. | 41.80 | Rocky Ford School District R-2 / 5,686 |
| 104. | 42.30 | Elizabeth School District C-1 / 14,036 |
| 105. | 42.40 | Lone Star School District 101 / 206 |
| 105. | 42.40 | Montrose County School District RE-1J / 38,641 |
| 105. | 42.40 | East Grand School District 2 / 11,196 |
| 108. | 42.50 | Fowler School District R-4J / 1,892 |
| 109. | 42.60 | Norwood School District R-2J / 2,070 |
| 109. | 42.60 | Kim Reorganized School District 88 / 383 |
| 111. | 42.70 | Frenchman School District RE-3 / 1,083 |
| 112. | 42.90 | Platte Valley School District RE-3 / 866 |
| 113. | 43.00 | South Conejos School District RE-10 / 2,167 |
| 114. | 43.10 | Karval School District RE-23 / 331 |
| 115. | 43.20 | Hi-Plains School District R-23 / 513 |
| 115. | 43.20 | Briggsdale School District RE-10 / 714 |
| 117. | 43.30 | Cheyenne County School District RE-5 / 1,459 |
| 117. | 43.30 | McClave School District RE-2 / 784 |
| 119. | 43.50 | Sangre de Cristo School District RE-22J / 1,245 |
| 120. | 43.70 | Littleton School District 6 / 92,823 |
| 121. | 43.90 | Lewis-Palmer School District 38 / 28,913 |
| 122. | 44.00 | Trinidad School District 1 / 10,136 |
| 122. | 44.00 | Aspen School District 1 / 12,732 |
| 122. | 44.00 | Kiowa School District C-2 / 2,644 |
| 125. | 44.30 | Canon City School District RE-1 / 28,097 |
| 125. | 44.30 | Akron School District R-1 / 2,570 |
| 127. | 44.50 | Platte Canyon School District 1 / 10,301 |
| 128. | 44.90 | Del Norte School District C-7 / 4,056 |
| 129. | 45.00 | Arickaree School District R-2 / 606 |
| 130. | 45.20 | Bayfield School District R-10-JT / 7,437 |
| 131. | 45.40 | Agate School District 300 / 673 |
| 132. | 45.50 | Pritchett School District RE-3 / 308 |
| 133. | 45.60 | Dolores County School District RE-2 / 1,947 |
| 134. | 45.70 | Salida School District R-32 / 9,836 |
| 135. | 45.80 | Clear Creek School District RE-1 / 9,059 |
| 135. | 45.80 | Walsh School District RE-1 / 1,167 |
| 137. | 45.90 | Delta County School District 50J / 31,449 |
| 137. | 45.90 | Cheyenne Mountain School District 12 / 22,068 |
| 137. | 45.90 | Dolores School District RE-4A / 3,759 |
| 140. | 46.00 | Otis School District R-3 / 955 |
| 141. | 46.20 | Calhan School District RJ-1 / 3,087 |
| 142. | 46.40 | Holly School District RE-3 / 1,204 |
| 143. | 46.50 | North Park School District R-1 / 1,397 |
| 144. | 47.00 | Cripple Creek-Victor School District RE-1 / 5,090 |
| 145. | 47.10 | Plateau School District RE-5 / 633 |
| 146. | 47.20 | Sierra Grande School District R-30 / 1,839 |
| 147. | 47.40 | Centennial School District R-1 / 1,717 |
| 148. | 47.50 | Woodland Park School District RE-2 / 18,073 |
| 149. | 47.60 | Archuleta County School District 50-JT / 11,558 |
| 150. | 47.80 | Big Sandy School District 100J / 1,548 |
| 151. | 47.90 | Plateau Valley School District 50 / 2,371 |
| 151. | 47.90 | Branson Reorganized School District 82 / 185 |
| 153. | 48.20 | Haxtun School District RE-2J / 1,464 |
| 154. | 48.30 | Manitou Springs School District 14 / 8,122 |
| 155. | 49.30 | Gilpin County School District RE-1 / 2,833 |
| 156. | 49.40 | Buena Vista School District R-31 / 8,082 |
| 156. | 49.40 | West End School District RE-2 / 1,655 |
| 158. | 49.50 | Huerfano School District RE-1 / 5,274 |
| 159. | 49.70 | Springfield School District RE-4 / 1,808 |
| 159. | 49.70 | Julesburg School District RE-1 / 1,512 |
| 161. | 50.00 | Genoa-Hugo School District C-113 / 1,194 |
| 162. | 50.40 | Ouray School District R-1 / 1,711 |
| 163. | 50.50 | Mancos School District RE-6 / 3,248 |
| 164. | 50.60 | Primero Reorganized School District 2 / 1,320 |
| 165. | 50.80 | Ridgway School District R-2 / 2,352 |
| 166. | 51.30 | Arriba-Flagler School District C-20 / 1,031 |
| 166. | 51.30 | Park County School District RE-2 / 5,867 |
| 168. | 52.00 | Weldon Valley School District RE-20J / 810 |
| 169. | 52.30 | Moffat Consolidated School District 2 / 1,413 |
| 170. | 52.50 | Custer County School District C-1 / 3,848 |
| 171. | 53.70 | Mountain Valley School District RE-1 / 1,413 |
| 172. | 53.80 | Park School District R-3 / 11,450 |
| 173. | 54.60 | Aguilar Reorganized School District 6 / 1,155 |
| 174. | 56.10 | Hinsdale County School District RE-1 / 741 |
| 175. | 56.90 | Cotopaxi School District RE-3 / 2,967 |
| 176. | 58.20 | La Veta School District RE-2 / 1,456 |
| 177. | 60.30 | Creede Consolidated School District 1 / 702 |
| 178. | 60.40 | Campo School District RE-6 / 242 |
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.
