| Rank | Median Age ▲ | School District / Population |
| 1. | 22.50 | Pullman School District / 31,922 |
| 2. | 24.50 | Wahluke School District / 8,342 |
| 3. | 25.40 | Ellensburg School District / 26,508 |
| 4. | 25.50 | Granger School District / 5,751 |
| 5. | 25.60 | Othello School District / 14,916 |
| 5. | 25.60 | Mabton School District / 3,555 |
| 7. | 26.30 | Toppenish School District / 14,415 |
| 8. | 26.50 | Royal School District / 6,437 |
| 9. | 26.60 | Sunnyside School District / 24,342 |
| 10. | 27.40 | Bridgeport School District / 3,252 |
| 11. | 27.80 | Grandview School District / 14,998 |
| 11. | 27.80 | Wapato School District / 13,777 |
| 13. | 28.00 | Mount Adams School District / 4,380 |
| 14. | 28.10 | Pasco School District / 68,155 |
| 15. | 28.20 | Taholah School District / 957 |
| 16. | 28.50 | Wellpinit School District / 1,116 |
| 17. | 29.20 | Warden School District / 4,022 |
| 18. | 29.40 | Quincy School District / 11,750 |
| 19. | 29.60 | Clover Park School District / 76,963 |
| 20. | 29.90 | Paterson School District / 451 |
| 21. | 30.20 | Roosevelt School District / 207 |
| 21. | 30.20 | North Franklin School District / 9,182 |
| 23. | 30.30 | Cheney School District / 33,075 |
| 24. | 30.40 | Prescott School District / 1,349 |
| 25. | 30.60 | Nespelem School District / 1,354 |
| 26. | 31.40 | Yakima School District / 77,427 |
| 27. | 31.60 | Brewster School District / 4,566 |
| 28. | 31.90 | Medical Lake School District / 11,244 |
| 29. | 32.00 | Oak Harbor School District / 37,813 |
| 30. | 32.20 | Franklin Pierce School District / 50,424 |
| 31. | 32.80 | Nooksack Valley School District / 10,056 |
| 32. | 33.10 | Moses Lake School District / 39,664 |
| 33. | 33.20 | Tukwila School District / 18,038 |
| 33. | 33.20 | Prosser School District / 12,996 |
| 35. | 33.50 | Bellingham School District / 102,121 |
| 36. | 33.60 | Queets-Clearwater School District / 629 |
| 36. | 33.60 | Lake Stevens School District / 39,977 |
| 36. | 33.60 | Kennewick School District / 85,577 |
| 39. | 33.70 | Mount Vernon School District / 36,531 |
| 40. | 34.10 | Mukilteo School District / 93,222 |
| 40. | 34.10 | Union Gap School District / 3,408 |
| 42. | 34.20 | Zillah School District / 5,123 |
| 43. | 34.30 | Cape Flattery School District / 3,197 |
| 44. | 34.40 | Highland School District / 5,610 |
| 44. | 34.40 | Orondo School District / 1,651 |
| 46. | 34.60 | College Place School District / 12,899 |
| 46. | 34.60 | Bremerton School District / 44,966 |
| 48. | 34.70 | Central Kitsap School District / 68,814 |
| 49. | 34.90 | Auburn School District / 84,053 |
| 50. | 35.10 | Bethel School District / 100,548 |
| 51. | 35.30 | Evergreen School District (Clark) / 139,009 |
| 52. | 35.40 | Kent School District / 158,233 |
| 52. | 35.40 | Fife Public Schools / 20,462 |
| 54. | 35.50 | Orting School District / 13,391 |
| 55. | 35.60 | Tacoma Public Schools / 208,938 |
| 55. | 35.60 | Spokane Public Schools / 221,110 |
| 57. | 35.70 | Federal Way School District / 130,706 |
| 58. | 35.80 | Battle Ground School District / 65,182 |
| 59. | 35.90 | Ephrata School District / 11,632 |
| 60. | 36.00 | Marysville School District / 69,169 |
| 60. | 36.00 | Puyallup School District / 118,946 |
| 62. | 36.10 | Seattle School District / 609,471 |
| 63. | 36.20 | Renton School District / 115,511 |
| 64. | 36.30 | East Valley School District (Spokane) / 25,817 |
| 64. | 36.30 | Everett School District / 129,842 |
| 66. | 36.50 | Walla Walla School District / 37,579 |
| 67. | 36.60 | Sumner School District / 43,512 |
| 68. | 36.70 | Quillayute Valley School District / 6,709 |
| 69. | 36.80 | Carbonado School District / 856 |
| 69. | 36.80 | Lake Washington School District / 177,476 |
| 71. | 36.90 | Wenatchee School District / 42,698 |
| 71. | 36.90 | Finley School District / 5,080 |
| 73. | 37.10 | Lynden School District / 18,386 |
| 73. | 37.10 | Inchelium School District / 1,202 |
| 73. | 37.10 | Yelm Community Schools / 29,740 |
| 73. | 37.10 | Eastmont School District / 29,884 |
| 77. | 37.20 | Vancouver Public Schools / 142,811 |
| 77. | 37.20 | Palisades School District / 269 |
| 77. | 37.20 | North Thurston Public Schools / 94,104 |
| 80. | 37.30 | Highline School District / 124,481 |
| 81. | 37.40 | Sultan School District / 13,130 |
| 81. | 37.40 | Steilacoom Historical School District / 20,920 |
| 83. | 37.50 | Monroe School District / 37,606 |
| 83. | 37.50 | Centralia School District / 22,909 |
| 83. | 37.50 | Aberdeen School District / 20,368 |
| 86. | 37.90 | Rochester School District / 14,285 |
| 86. | 37.90 | East Valley School District (Yakima) / 15,549 |
| 86. | 37.90 | Camas School District / 28,306 |
| 89. | 38.10 | Tahoma School District / 37,376 |
| 89. | 38.10 | Mead School District / 50,919 |
| 89. | 38.10 | Shelton School District / 23,747 |
| 92. | 38.20 | Snoqualmie Valley School District / 35,054 |
| 92. | 38.20 | Kelso School District / 28,482 |
| 92. | 38.20 | Issaquah School District / 98,660 |
| 92. | 38.20 | Selah School District / 18,675 |
| 96. | 38.30 | Woodland School District / 11,971 |
| 97. | 38.40 | Chehalis School District / 14,527 |
| 98. | 38.50 | White River School District / 22,116 |
| 99. | 38.60 | Richland School District / 62,323 |
| 99. | 38.60 | Northshore School District / 122,684 |
| 101. | 38.70 | Olympia School District / 61,756 |
| 101. | 38.70 | Bellevue School District / 124,003 |
| 101. | 38.70 | Edmonds School District / 154,583 |
| 104. | 38.80 | Lakewood School District / 13,926 |
| 104. | 38.80 | Dieringer School District / 8,802 |
| 104. | 38.80 | University Place School District / 28,944 |
| 107. | 38.90 | Kittitas School District / 3,673 |
| 107. | 38.90 | Central Valley School District / 76,487 |
| 107. | 38.90 | Kiona-Benton School District / 8,408 |
| 110. | 39.00 | Granite Falls School District / 13,285 |
| 110. | 39.00 | Manson School District / 3,583 |
| 112. | 39.10 | Burlington-Edison School District / 20,952 |
| 113. | 39.20 | Washougal School District / 19,168 |
| 114. | 39.30 | Ferndale School District / 30,392 |
| 114. | 39.30 | Elma School District / 8,932 |
| 114. | 39.30 | Arlington School District / 29,735 |
| 117. | 39.40 | Snohomish School District / 51,850 |
| 118. | 39.50 | Hoquiam School District / 10,797 |
| 118. | 39.50 | Lind School District / 1,185 |
| 118. | 39.50 | Sedro-Woolley School District / 26,212 |
| 121. | 39.60 | Cashmere School District / 7,446 |
| 122. | 39.90 | Adna School District / 3,736 |
| 122. | 39.90 | Mount Baker School District / 14,352 |
| 122. | 39.90 | Napavine School District / 4,316 |
| 122. | 39.90 | Riverview School District / 19,315 |
| 126. | 40.00 | Tumwater School District / 36,566 |
| 126. | 40.00 | West Valley School District / 18,872 |
| 128. | 40.10 | South Kitsap School District / 68,017 |
| 129. | 40.20 | Longview Public Schools / 45,370 |
| 129. | 40.20 | Touchet School District / 1,124 |
| 129. | 40.20 | Meridian School District / 9,779 |
| 132. | 40.30 | Okanogan School District / 5,637 |
| 132. | 40.30 | Hockinson School District / 8,710 |
| 132. | 40.30 | Davenport School District / 3,002 |
| 135. | 40.50 | Columbia School District / 3,892 |
| 136. | 40.70 | McCleary School District / 3,015 |
| 136. | 40.70 | La Center School District / 8,204 |
| 136. | 40.70 | Deer Park School District / 10,849 |
| 139. | 40.80 | West Valley School District / 28,648 |
| 139. | 40.80 | Ridgefield School District / 13,923 |
| 139. | 40.80 | Stehekin School District / 104 |
| 142. | 40.90 | Keller School District / 503 |
| 143. | 41.00 | Satsop School District / 576 |
| 144. | 41.10 | Omak School District / 10,481 |
| 145. | 41.30 | Lake Quinault School District / 1,187 |
| 146. | 41.60 | Summit Valley School District / 621 |
| 146. | 41.60 | White Salmon Valley School District / 7,849 |
| 146. | 41.60 | Enumclaw School District / 25,179 |
| 146. | 41.60 | Mary Walker School District / 3,206 |
| 150. | 41.90 | Pe Ell School District / 1,737 |
| 151. | 42.00 | Winlock School District / 4,446 |
| 152. | 42.10 | Rainier School District / 5,062 |
| 152. | 42.10 | Oakville School District / 2,363 |
| 154. | 42.20 | Green Mountain School District / 815 |
| 155. | 42.30 | Cosmopolis School District / 2,013 |
| 156. | 42.60 | Clarkston School District / 18,461 |
| 157. | 42.70 | Shoreline School District / 65,547 |
| 157. | 42.70 | Eatonville School District / 12,084 |
| 159. | 42.90 | Nine Mile Falls School District / 8,720 |
| 159. | 42.90 | Lake Chelan School District / 7,135 |
| 161. | 43.00 | Stevenson-Carson School District / 6,199 |
| 161. | 43.00 | Pateros School District / 1,542 |
| 163. | 43.10 | Boistfort School District / 894 |
| 164. | 43.20 | Tenino School District / 9,479 |
| 164. | 43.20 | North Kitsap School District / 45,966 |
| 166. | 43.30 | Reardan-Edwall School District / 4,260 |
| 167. | 43.40 | Waitsburg School District / 1,555 |
| 167. | 43.40 | Raymond School District / 3,678 |
| 167. | 43.40 | Valley School District / 1,413 |
| 167. | 43.40 | Colfax School District / 3,985 |
| 171. | 43.50 | Entiat School District / 2,197 |
| 171. | 43.50 | Columbia School District / 1,172 |
| 173. | 43.60 | Darrington School District / 3,210 |
| 174. | 43.80 | Toutle Lake School District / 3,348 |
| 175. | 44.00 | Montesano School District / 8,042 |
| 176. | 44.20 | Naches Valley School District / 8,078 |
| 177. | 44.30 | Onalaska School District / 5,293 |
| 177. | 44.30 | Curlew School District / 1,497 |
| 179. | 44.40 | Colton School District / 1,106 |
| 180. | 44.50 | Peninsula School District / 61,651 |
| 181. | 44.60 | Kalama School District / 6,354 |
| 182. | 44.80 | Palouse School District / 1,391 |
| 182. | 44.80 | Port Angeles School District / 30,152 |
| 184. | 44.90 | Easton School District / 1,134 |
| 184. | 44.90 | North Mason School District / 14,752 |
| 186. | 45.00 | Riverside School District / 11,407 |
| 186. | 45.00 | Conway School District / 3,102 |
| 186. | 45.00 | Kahlotus School District / 384 |
| 189. | 45.10 | Toledo School District / 4,387 |
| 189. | 45.10 | Wishkah Valley School District / 835 |
| 189. | 45.10 | Southside School District / 2,227 |
| 192. | 45.20 | Waterville School District / 1,659 |
| 193. | 45.30 | South Bend School District / 2,545 |
| 193. | 45.30 | Blaine School District / 15,974 |
| 193. | 45.30 | Mount Pleasant School District / 332 |
| 196. | 45.40 | Tekoa School District / 943 |
| 197. | 45.50 | Trout Lake School District / 959 |
| 198. | 45.60 | Colville School District / 11,571 |
| 199. | 45.80 | Wilson Creek School District / 583 |
| 199. | 45.80 | Mary M. Knight School District / 1,428 |
| 201. | 45.90 | Freeman School District / 4,305 |
| 201. | 45.90 | Ocosta School District / 7,559 |
| 203. | 46.00 | Stanwood-Camano School District / 32,907 |
| 203. | 46.00 | Mercer Island School District / 22,699 |
| 205. | 46.10 | Cascade School District / 9,560 |
| 206. | 46.20 | Castle Rock School District / 9,891 |
| 206. | 46.20 | Harrington School District / 739 |
| 206. | 46.20 | Liberty School District / 4,440 |
| 209. | 46.30 | Evaline School District / 823 |
| 209. | 46.30 | Wishram School District / 394 |
| 211. | 46.40 | Lamont School District / 176 |
| 211. | 46.40 | Rosalia School District / 1,089 |
| 213. | 46.50 | Star School District / 75 |
| 214. | 46.60 | Oakesdale School District / 837 |
| 214. | 46.60 | Oroville School District / 4,439 |
| 216. | 46.80 | Thorp School District / 1,402 |
| 217. | 46.90 | North River School District / 223 |
| 218. | 47.00 | Mossyrock School District / 3,994 |
| 218. | 47.00 | Great Northern School District / 695 |
| 218. | 47.00 | Concrete School District / 4,840 |
| 221. | 47.10 | Klickitat School District / 592 |
| 221. | 47.10 | Willapa Valley School District / 2,231 |
| 221. | 47.10 | Chewelah School District / 6,060 |
| 224. | 47.30 | Asotin-Anatone School District / 3,245 |
| 224. | 47.30 | Garfield School District / 789 |
| 226. | 47.40 | Newport School District / 8,083 |
| 226. | 47.40 | Naselle-Grays River Valley School District / 2,240 |
| 228. | 47.50 | Mill A School District / 482 |
| 228. | 47.50 | Orchard Prairie School District / 694 |
| 230. | 47.60 | Centerville School District / 524 |
| 230. | 47.60 | Tonasket School District / 6,638 |
| 232. | 47.70 | Goldendale School District / 7,076 |
| 232. | 47.70 | Bainbridge Island School District / 23,025 |
| 232. | 47.70 | Almira School District / 489 |
| 235. | 47.80 | Dayton School District / 3,797 |
| 235. | 47.80 | Damman School District / 769 |
| 237. | 47.90 | Ritzville School District / 2,388 |
| 238. | 48.00 | Griffin School District / 5,791 |
| 238. | 48.00 | Pioneer School District / 10,083 |
| 238. | 48.00 | Kettle Falls School District / 5,385 |
| 241. | 48.10 | Sprague School District / 675 |
| 241. | 48.10 | Cle Elum-Roslyn School District / 7,379 |
| 243. | 48.20 | Soap Lake School District / 3,310 |
| 244. | 48.40 | Cusick School District / 1,989 |
| 244. | 48.40 | Dixie School District / 495 |
| 246. | 48.70 | Grand Coulee Dam School District / 4,236 |
| 246. | 48.70 | St. John School District / 1,069 |
| 248. | 48.80 | Odessa School District / 1,509 |
| 249. | 49.00 | Bickleton School District / 366 |
| 250. | 49.10 | Steptoe School District / 281 |
| 251. | 49.20 | Pomeroy School District / 2,191 |
| 252. | 49.30 | Anacortes School District / 20,332 |
| 252. | 49.30 | Lyle School District / 2,809 |
| 254. | 49.60 | Glenwood School District / 457 |
| 255. | 49.70 | Morton School District / 2,742 |
| 255. | 49.70 | Crescent School District / 2,609 |
| 257. | 49.80 | Republic School District / 3,288 |
| 258. | 50.00 | Wilbur School District / 1,342 |
| 259. | 50.10 | Index School District / 526 |
| 259. | 50.10 | Selkirk School District / 2,213 |
| 259. | 50.10 | LaCrosse School District / 680 |
| 262. | 50.20 | Vashon Island School District / 10,624 |
| 263. | 50.30 | Mansfield School District / 495 |
| 264. | 50.50 | Coulee-Hartline School District / 1,384 |
| 265. | 50.80 | Skykomish School District / 627 |
| 266. | 51.10 | San Juan Island School District / 7,662 |
| 267. | 51.20 | Skamania School District / 789 |
| 267. | 51.20 | Methow Valley School District / 5,230 |
| 269. | 51.60 | Endicott School District / 544 |
| 270. | 51.70 | Wahkiakum School District / 3,148 |
| 271. | 51.80 | Quilcene School District / 1,760 |
| 272. | 52.10 | Orcas Island School District / 5,387 |
| 273. | 52.20 | Orient School District / 879 |
| 274. | 52.30 | Washtucna School District / 313 |
| 274. | 52.30 | Loon Lake School District / 1,710 |
| 274. | 52.30 | White Pass School District / 4,080 |
| 277. | 53.00 | Northport School District / 1,482 |
| 277. | 53.00 | Evergreen School District (Stevens) / 424 |
| 277. | 53.00 | La Conner School District / 4,694 |
| 280. | 53.40 | South Whidbey School District / 15,336 |
| 281. | 53.50 | Onion Creek School District / 398 |
| 282. | 53.60 | Coupeville School District / 9,696 |
| 283. | 54.20 | Port Townsend School District / 14,278 |
| 284. | 54.40 | Grapeview School District / 2,567 |
| 284. | 54.40 | Chimacum School District / 11,350 |
| 286. | 55.00 | Hood Canal School District / 5,908 |
| 287. | 55.60 | Ocean Beach School District / 10,032 |
| 288. | 55.70 | North Beach School District / 7,329 |
| 289. | 56.60 | Lopez School District / 2,480 |
| 290. | 57.20 | Sequim School District / 29,342 |
| 291. | 57.30 | Starbuck School District / 169 |
| 292. | 57.50 | Benge School District / 54 |
| 293. | 57.60 | Brinnon School District / 1,250 |
| 293. | 57.60 | Shaw Island School District / 240 |
| 295. | 58.80 | Creston School District / 1,151 |
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.
