| Rank | Median Age ▲ | School District / Population |
| 1. | 21.90 | Pullman School District / 32,763 |
| 2. | 22.80 | Wahluke School District / 8,345 |
| 3. | 24.60 | Granger School District / 5,943 |
| 4. | 25.40 | Othello School District / 14,769 |
| 5. | 25.60 | Royal School District / 6,709 |
| 6. | 25.90 | Ellensburg School District / 26,774 |
| 7. | 26.20 | Toppenish School District / 15,652 |
| 8. | 26.30 | Sunnyside School District / 25,306 |
| 9. | 27.10 | Wapato School District / 13,779 |
| 10. | 27.70 | Prescott School District / 1,564 |
| 11. | 28.00 | Mount Adams School District / 4,045 |
| 11. | 28.00 | Grandview School District / 15,786 |
| 13. | 28.40 | Bridgeport School District / 3,324 |
| 14. | 28.60 | Pasco School District / 73,998 |
| 15. | 29.00 | Union Gap School District / 3,708 |
| 16. | 29.50 | Quincy School District / 12,473 |
| 17. | 29.60 | Warden School District / 4,068 |
| 17. | 29.60 | Clover Park School District / 81,580 |
| 19. | 29.90 | Nespelem School District / 1,120 |
| 20. | 30.30 | Kahlotus School District / 283 |
| 21. | 30.40 | Medical Lake School District / 11,325 |
| 21. | 30.40 | Mabton School District / 3,283 |
| 23. | 30.50 | Roosevelt School District / 217 |
| 23. | 30.50 | North Franklin School District / 10,061 |
| 25. | 30.70 | Star School District / 79 |
| 26. | 31.00 | Paterson School District / 352 |
| 26. | 31.00 | Cheney School District / 34,461 |
| 28. | 31.10 | College Place School District / 13,500 |
| 29. | 31.60 | Prosser School District / 14,382 |
| 30. | 31.90 | Yakima School District / 78,730 |
| 30. | 31.90 | Palisades School District / 366 |
| 32. | 32.00 | Nooksack Valley School District / 11,244 |
| 33. | 32.30 | Oak Harbor School District / 37,644 |
| 34. | 32.40 | Highland School District / 5,388 |
| 35. | 32.50 | Brewster School District / 4,498 |
| 36. | 33.00 | Bellingham School District / 103,698 |
| 36. | 33.00 | Taholah School District / 899 |
| 38. | 33.50 | Mount Vernon School District / 38,393 |
| 39. | 33.60 | Lake Stevens School District / 41,019 |
| 40. | 33.70 | Tukwila School District / 18,514 |
| 40. | 33.70 | Green Mountain School District / 1,057 |
| 42. | 33.80 | Moses Lake School District / 40,936 |
| 42. | 33.80 | Zillah School District / 5,293 |
| 44. | 34.00 | Franklin Pierce School District / 51,245 |
| 44. | 34.00 | Kennewick School District / 88,498 |
| 46. | 34.10 | Orondo School District / 1,547 |
| 47. | 34.20 | Bremerton School District / 45,904 |
| 48. | 34.40 | Bethel School District / 103,634 |
| 48. | 34.40 | Mukilteo School District / 96,423 |
| 50. | 34.70 | Dieringer School District / 10,109 |
| 51. | 34.90 | Fife Public Schools / 21,518 |
| 52. | 35.10 | Orting School District / 13,762 |
| 53. | 35.40 | Cape Flattery School District / 2,855 |
| 53. | 35.40 | Waterville School District / 2,362 |
| 55. | 35.50 | Evergreen School District (Clark) / 144,158 |
| 55. | 35.50 | Sumner School District / 43,664 |
| 57. | 35.60 | Battle Ground School District / 67,123 |
| 57. | 35.60 | Central Kitsap School District / 70,396 |
| 57. | 35.60 | Rochester School District / 14,715 |
| 60. | 35.70 | Yelm Community Schools / 30,223 |
| 60. | 35.70 | Wellpinit School District / 999 |
| 60. | 35.70 | Kent School District / 163,185 |
| 63. | 35.80 | Lamont School District / 191 |
| 63. | 35.80 | Spokane Public Schools / 221,617 |
| 65. | 35.90 | Wenatchee School District / 43,416 |
| 66. | 36.00 | Seattle School District / 638,610 |
| 66. | 36.00 | Auburn School District / 86,733 |
| 68. | 36.10 | Tacoma Public Schools / 212,381 |
| 68. | 36.10 | Finley School District / 5,006 |
| 70. | 36.20 | Ephrata School District / 11,355 |
| 71. | 36.30 | Federal Way School District / 134,509 |
| 72. | 36.40 | Queets-Clearwater School District / 789 |
| 72. | 36.40 | Centralia School District / 22,421 |
| 74. | 36.50 | Woodland School District / 10,908 |
| 74. | 36.50 | Renton School District / 118,608 |
| 76. | 36.60 | Wilson Creek School District / 461 |
| 77. | 36.80 | North Thurston Public Schools / 97,287 |
| 77. | 36.80 | Puyallup School District / 121,755 |
| 77. | 36.80 | Lake Washington School District / 186,310 |
| 77. | 36.80 | Highline School District / 128,065 |
| 77. | 36.80 | Everett School District / 134,180 |
| 82. | 37.00 | University Place School District / 29,934 |
| 82. | 37.00 | Marysville School District / 71,032 |
| 84. | 37.40 | East Valley School District (Spokane) / 26,463 |
| 84. | 37.40 | Oakville School District / 2,558 |
| 84. | 37.40 | Selah School District / 18,117 |
| 87. | 37.50 | Monroe School District / 39,271 |
| 88. | 37.80 | Vancouver Public Schools / 145,307 |
| 89. | 37.90 | Mead School District / 51,622 |
| 89. | 37.90 | Bellevue School District / 128,388 |
| 91. | 38.00 | Walla Walla School District / 38,110 |
| 91. | 38.00 | Richland School District / 65,458 |
| 91. | 38.00 | White Salmon Valley School District / 7,396 |
| 91. | 38.00 | Carbonado School District / 732 |
| 91. | 38.00 | Eastmont School District / 29,976 |
| 91. | 38.00 | Benge School District / 118 |
| 97. | 38.10 | Lakewood School District / 13,903 |
| 98. | 38.40 | Steilacoom Historical School District / 20,969 |
| 99. | 38.50 | Chehalis School District / 15,339 |
| 99. | 38.50 | Kelso School District / 28,516 |
| 99. | 38.50 | Issaquah School District / 105,010 |
| 99. | 38.50 | Lynden School District / 18,355 |
| 103. | 38.70 | Aberdeen School District / 19,905 |
| 103. | 38.70 | Reardan-Edwall School District / 4,909 |
| 103. | 38.70 | East Valley School District (Yakima) / 15,061 |
| 106. | 38.80 | Pateros School District / 1,430 |
| 106. | 38.80 | Edmonds School District / 159,316 |
| 108. | 38.90 | Snoqualmie Valley School District / 36,121 |
| 109. | 39.00 | White River School District / 21,088 |
| 110. | 39.10 | Northshore School District / 128,593 |
| 110. | 39.10 | McCleary School District / 3,014 |
| 110. | 39.10 | Olympia School District / 62,892 |
| 113. | 39.20 | Camas School District / 29,911 |
| 113. | 39.20 | Winlock School District / 5,296 |
| 113. | 39.20 | Tahoma School District / 39,802 |
| 116. | 39.30 | Ferndale School District / 30,515 |
| 117. | 39.40 | Inchelium School District / 1,183 |
| 117. | 39.40 | Sultan School District / 13,382 |
| 119. | 39.50 | Washougal School District / 20,325 |
| 119. | 39.50 | Colfax School District / 4,185 |
| 121. | 39.60 | Central Valley School District / 77,908 |
| 121. | 39.60 | Summit Valley School District / 603 |
| 123. | 39.70 | Shelton School District / 23,526 |
| 123. | 39.70 | Hoquiam School District / 10,827 |
| 125. | 39.80 | Arlington School District / 30,700 |
| 126. | 39.90 | Snohomish School District / 52,659 |
| 127. | 40.00 | North River School District / 307 |
| 127. | 40.00 | Tumwater School District / 37,970 |
| 129. | 40.20 | South Kitsap School District / 66,259 |
| 129. | 40.20 | Manson School District / 3,340 |
| 131. | 40.30 | Deer Park School District / 10,436 |
| 131. | 40.30 | Boistfort School District / 1,022 |
| 133. | 40.60 | Touchet School District / 1,126 |
| 133. | 40.60 | Davenport School District / 2,970 |
| 135. | 40.70 | Lake Chelan School District / 7,582 |
| 135. | 40.70 | Granite Falls School District / 13,740 |
| 135. | 40.70 | Quillayute Valley School District / 6,383 |
| 135. | 40.70 | Sedro-Woolley School District / 26,417 |
| 139. | 40.80 | Palouse School District / 1,422 |
| 140. | 40.90 | Elma School District / 8,572 |
| 141. | 41.00 | Napavine School District / 4,279 |
| 142. | 41.10 | Kittitas School District / 4,058 |
| 142. | 41.10 | Cashmere School District / 8,343 |
| 144. | 41.20 | Nine Mile Falls School District / 9,594 |
| 144. | 41.20 | Omak School District / 10,412 |
| 146. | 41.30 | Riverview School District / 19,629 |
| 147. | 41.60 | Hockinson School District / 8,872 |
| 148. | 41.70 | Burlington-Edison School District / 20,510 |
| 149. | 41.80 | Coulee-Hartline School District / 1,579 |
| 150. | 41.90 | West Valley School District / 28,705 |
| 151. | 42.00 | Tonasket School District / 7,573 |
| 151. | 42.00 | Longview Public Schools / 44,887 |
| 153. | 42.10 | Okanogan School District / 5,556 |
| 153. | 42.10 | Columbia School District / 3,466 |
| 155. | 42.20 | Kalama School District / 6,850 |
| 156. | 42.30 | Valley School District / 1,360 |
| 157. | 42.40 | West Valley School District / 19,374 |
| 157. | 42.40 | Shoreline School District / 67,123 |
| 159. | 42.50 | Centerville School District / 922 |
| 159. | 42.50 | Mary Walker School District / 3,060 |
| 161. | 42.60 | Colton School District / 1,198 |
| 161. | 42.60 | Montesano School District / 8,426 |
| 163. | 42.70 | Ocosta School District / 7,250 |
| 164. | 42.90 | Tenino School District / 9,808 |
| 165. | 43.00 | Mount Baker School District / 15,423 |
| 165. | 43.00 | La Center School District / 8,523 |
| 165. | 43.00 | Kiona-Benton School District / 8,106 |
| 168. | 43.10 | Glenwood School District / 484 |
| 169. | 43.20 | Bickleton School District / 461 |
| 169. | 43.20 | Keller School District / 430 |
| 171. | 43.30 | Lind School District / 985 |
| 172. | 43.40 | Satsop School District / 583 |
| 172. | 43.40 | Clarkston School District / 18,858 |
| 174. | 43.50 | Castle Rock School District / 10,377 |
| 175. | 43.60 | Enumclaw School District / 25,760 |
| 176. | 43.70 | Darrington School District / 3,279 |
| 177. | 43.90 | Pe Ell School District / 1,811 |
| 177. | 43.90 | North Kitsap School District / 47,616 |
| 177. | 43.90 | Waitsburg School District / 1,295 |
| 180. | 44.00 | Port Angeles School District / 30,792 |
| 180. | 44.00 | Meridian School District / 9,030 |
| 182. | 44.20 | Blaine School District / 16,491 |
| 183. | 44.40 | Liberty School District / 4,450 |
| 184. | 44.60 | Orchard Prairie School District / 760 |
| 184. | 44.60 | Ridgefield School District / 14,498 |
| 186. | 44.70 | Peninsula School District / 62,980 |
| 187. | 44.80 | Ritzville School District / 2,611 |
| 188. | 45.00 | Adna School District / 3,445 |
| 188. | 45.00 | Freeman School District / 4,013 |
| 190. | 45.20 | Eatonville School District / 10,930 |
| 191. | 45.30 | Stevenson-Carson School District / 5,976 |
| 191. | 45.30 | Rosalia School District / 1,115 |
| 193. | 45.40 | Raymond School District / 4,031 |
| 194. | 45.50 | Mercer Island School District / 23,636 |
| 195. | 45.60 | Entiat School District / 2,379 |
| 196. | 46.10 | North Mason School District / 14,521 |
| 197. | 46.20 | Mary M. Knight School District / 1,639 |
| 198. | 46.30 | Tekoa School District / 1,040 |
| 198. | 46.30 | Naselle-Grays River Valley School District / 2,412 |
| 200. | 46.40 | St. John School District / 1,108 |
| 201. | 46.50 | Harrington School District / 620 |
| 201. | 46.50 | Trout Lake School District / 876 |
| 203. | 46.60 | Great Northern School District / 968 |
| 204. | 46.80 | Rainier School District / 4,955 |
| 204. | 46.80 | Republic School District / 3,751 |
| 206. | 46.90 | Concrete School District / 4,949 |
| 206. | 46.90 | Oakesdale School District / 900 |
| 208. | 47.00 | Grand Coulee Dam School District / 4,753 |
| 208. | 47.00 | Stanwood-Camano School District / 32,457 |
| 208. | 47.00 | Newport School District / 8,238 |
| 211. | 47.10 | Cosmopolis School District / 1,867 |
| 211. | 47.10 | Klickitat School District / 747 |
| 213. | 47.20 | Riverside School District / 11,129 |
| 214. | 47.30 | Southside School District / 2,210 |
| 214. | 47.30 | Wishkah Valley School District / 879 |
| 216. | 47.40 | Bainbridge Island School District / 23,206 |
| 217. | 47.50 | Damman School District / 756 |
| 217. | 47.50 | Goldendale School District / 6,966 |
| 219. | 47.60 | South Bend School District / 2,446 |
| 220. | 47.70 | Naches Valley School District / 8,394 |
| 221. | 47.80 | Toutle Lake School District / 3,160 |
| 221. | 47.80 | Cle Elum-Roslyn School District / 7,728 |
| 223. | 48.00 | Colville School District / 11,398 |
| 223. | 48.00 | Wishram School District / 424 |
| 223. | 48.00 | Conway School District / 2,969 |
| 226. | 48.20 | Cascade School District / 8,854 |
| 226. | 48.20 | Mansfield School District / 560 |
| 228. | 48.30 | Asotin-Anatone School District / 3,169 |
| 228. | 48.30 | Dayton School District / 3,837 |
| 230. | 48.40 | Onalaska School District / 5,103 |
| 231. | 48.60 | Mill A School District / 498 |
| 232. | 48.70 | Mount Pleasant School District / 377 |
| 233. | 48.80 | Pioneer School District / 10,416 |
| 234. | 49.00 | Chewelah School District / 6,111 |
| 235. | 49.10 | Toledo School District / 4,146 |
| 236. | 49.30 | Steptoe School District / 313 |
| 236. | 49.30 | Washtucna School District / 374 |
| 238. | 49.40 | Almira School District / 441 |
| 239. | 49.70 | Skamania School District / 785 |
| 240. | 50.00 | Thorp School District / 1,422 |
| 241. | 50.10 | Griffin School District / 6,347 |
| 241. | 50.10 | Index School District / 608 |
| 241. | 50.10 | Lake Quinault School District / 1,145 |
| 241. | 50.10 | Curlew School District / 1,268 |
| 245. | 50.20 | Dixie School District / 478 |
| 246. | 50.30 | Oroville School District / 3,998 |
| 247. | 50.60 | Mossyrock School District / 4,049 |
| 247. | 50.60 | Vashon Island School District / 10,447 |
| 247. | 50.60 | Anacortes School District / 20,359 |
| 250. | 50.70 | Willapa Valley School District / 2,300 |
| 251. | 50.80 | Kettle Falls School District / 5,479 |
| 252. | 50.90 | Pomeroy School District / 2,168 |
| 253. | 51.10 | Crescent School District / 2,720 |
| 254. | 51.30 | Endicott School District / 497 |
| 254. | 51.30 | Stehekin School District / 7 |
| 254. | 51.30 | Selkirk School District / 2,224 |
| 257. | 51.40 | Grapeview School District / 2,626 |
| 258. | 51.50 | San Juan Island School District / 7,771 |
| 259. | 51.60 | Wilbur School District / 1,237 |
| 260. | 51.70 | Methow Valley School District / 4,979 |
| 260. | 51.70 | Orient School District / 997 |
| 262. | 51.80 | Evaline School District / 647 |
| 263. | 52.00 | Cusick School District / 1,842 |
| 264. | 52.10 | Easton School District / 954 |
| 265. | 52.30 | Odessa School District / 1,431 |
| 266. | 52.40 | Columbia School District / 1,171 |
| 266. | 52.40 | Soap Lake School District / 3,285 |
| 266. | 52.40 | Northport School District / 1,581 |
| 269. | 52.70 | La Conner School District / 4,631 |
| 270. | 52.80 | Skykomish School District / 430 |
| 271. | 53.40 | Quilcene School District / 1,659 |
| 271. | 53.40 | Wahkiakum School District / 2,894 |
| 273. | 53.60 | Sprague School District / 697 |
| 274. | 53.80 | Garfield School District / 632 |
| 275. | 54.70 | Coupeville School District / 10,520 |
| 276. | 54.80 | White Pass School District / 3,671 |
| 277. | 54.90 | South Whidbey School District / 15,586 |
| 277. | 54.90 | Onion Creek School District / 378 |
| 279. | 55.00 | Morton School District / 2,556 |
| 279. | 55.00 | Orcas Island School District / 5,251 |
| 281. | 55.10 | Ocean Beach School District / 9,571 |
| 281. | 55.10 | Chimacum School District / 11,424 |
| 283. | 55.20 | Lyle School District / 2,549 |
| 284. | 55.30 | LaCrosse School District / 668 |
| 285. | 55.70 | Port Townsend School District / 14,284 |
| 286. | 56.20 | Evergreen School District (Stevens) / 429 |
| 287. | 56.40 | Loon Lake School District / 1,649 |
| 288. | 56.60 | Hood Canal School District / 5,509 |
| 289. | 57.10 | Sequim School District / 29,833 |
| 289. | 57.10 | North Beach School District / 7,055 |
| 291. | 57.40 | Starbuck School District / 131 |
| 292. | 57.50 | Lopez School District / 2,604 |
| 293. | 58.00 | Brinnon School District / 1,263 |
| 294. | 59.80 | Shaw Island School District / 221 |
| 295. | 61.10 | Creston School District / 1,058 |
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.
