| Rank | Median Age ▲ | School District / Population |
| 1. | 22.30 | Pullman School District / 30,758 |
| 2. | 23.40 | Wahluke School District / 7,027 |
| 3. | 24.10 | Granger School District / 5,220 |
| 4. | 24.70 | Prescott School District / 2,106 |
| 5. | 24.80 | Mount Adams School District / 4,522 |
| 6. | 24.90 | Ellensburg School District / 26,244 |
| 7. | 26.20 | Othello School District / 13,783 |
| 8. | 26.40 | Wapato School District / 13,183 |
| 9. | 27.00 | Toppenish School District / 14,837 |
| 10. | 27.10 | Brewster School District / 4,142 |
| 11. | 27.20 | Paterson School District / 480 |
| 12. | 27.30 | Star School District / 134 |
| 13. | 27.50 | Mabton School District / 2,815 |
| 13. | 27.50 | Medical Lake School District / 12,424 |
| 15. | 27.70 | Sunnyside School District / 23,418 |
| 15. | 27.70 | Quincy School District / 11,173 |
| 17. | 28.00 | Grandview School District / 14,140 |
| 18. | 28.30 | Pasco School District / 62,882 |
| 19. | 28.50 | Taholah School District / 922 |
| 20. | 28.70 | Royal School District / 5,910 |
| 20. | 28.70 | Clover Park School District / 79,175 |
| 22. | 29.30 | Bridgeport School District / 3,380 |
| 23. | 29.70 | North Franklin School District / 7,662 |
| 24. | 29.90 | Warden School District / 3,650 |
| 25. | 30.10 | Cape Flattery School District / 3,566 |
| 26. | 30.30 | Nespelem School District / 1,101 |
| 27. | 30.60 | Cheney School District / 30,989 |
| 28. | 30.90 | Oak Harbor School District / 38,556 |
| 29. | 31.30 | Yakima School District / 75,772 |
| 30. | 31.50 | Carbonado School District / 664 |
| 31. | 31.70 | Queets-Clearwater School District / 1,130 |
| 32. | 32.00 | Benge School District / 109 |
| 33. | 32.30 | Green Mountain School District / 751 |
| 34. | 32.70 | Moses Lake School District / 39,691 |
| 34. | 32.70 | Highland School District / 5,706 |
| 36. | 32.80 | Union Gap School District / 3,359 |
| 36. | 32.80 | Kahlotus School District / 370 |
| 38. | 33.10 | Mukilteo School District / 90,109 |
| 38. | 33.10 | Mount Vernon School District / 36,389 |
| 38. | 33.10 | Palisades School District / 467 |
| 41. | 33.20 | Lake Stevens School District / 37,810 |
| 41. | 33.20 | Tukwila School District / 17,415 |
| 43. | 33.50 | Franklin Pierce School District / 51,796 |
| 44. | 33.60 | Bellingham School District / 100,627 |
| 45. | 33.70 | Bremerton School District / 45,719 |
| 46. | 33.80 | Nooksack Valley School District / 10,236 |
| 46. | 33.80 | Kennewick School District / 82,095 |
| 48. | 34.00 | Manson School District / 3,282 |
| 49. | 34.30 | Bethel School District / 98,233 |
| 50. | 34.50 | Prosser School District / 12,466 |
| 50. | 34.50 | College Place School District / 12,221 |
| 52. | 34.60 | Zillah School District / 4,559 |
| 53. | 34.90 | Orting School District / 12,652 |
| 54. | 35.10 | Auburn School District / 81,624 |
| 54. | 35.10 | Kent School District / 152,246 |
| 54. | 35.10 | Puyallup School District / 118,091 |
| 57. | 35.20 | Yelm Community Schools / 27,788 |
| 58. | 35.30 | Battle Ground School District / 59,507 |
| 59. | 35.50 | Meridian School District / 9,417 |
| 60. | 35.60 | Evergreen School District (Clark) / 139,306 |
| 61. | 35.70 | Marysville School District / 67,646 |
| 61. | 35.70 | Camas School District / 27,133 |
| 61. | 35.70 | Federal Way School District / 129,316 |
| 64. | 35.80 | East Valley School District (Spokane) / 25,034 |
| 64. | 35.80 | Glenwood School District / 484 |
| 64. | 35.80 | Finley School District / 4,729 |
| 64. | 35.80 | Tacoma Public Schools / 209,049 |
| 68. | 35.90 | Renton School District / 110,314 |
| 68. | 35.90 | Sumner School District / 42,828 |
| 68. | 35.90 | Spokane Public Schools / 218,365 |
| 68. | 35.90 | Lake Washington School District / 172,716 |
| 72. | 36.10 | Central Kitsap School District / 66,487 |
| 72. | 36.10 | Vancouver Public Schools / 140,573 |
| 74. | 36.20 | Deer Park School District / 10,737 |
| 74. | 36.20 | Everett School District / 124,762 |
| 76. | 36.30 | Seattle School District / 596,008 |
| 77. | 36.40 | Woodland School District / 11,250 |
| 77. | 36.40 | Monroe School District / 37,145 |
| 79. | 36.60 | Columbia School District / 3,956 |
| 80. | 36.70 | Chehalis School District / 15,496 |
| 80. | 36.70 | Sultan School District / 13,331 |
| 80. | 36.70 | Issaquah School District / 96,738 |
| 80. | 36.70 | Selah School District / 17,935 |
| 84. | 36.80 | Tekoa School District / 1,197 |
| 84. | 36.80 | Orondo School District / 1,330 |
| 86. | 36.90 | Mary M. Knight School District / 1,903 |
| 86. | 36.90 | Fife Public Schools / 19,492 |
| 88. | 37.10 | Olympia School District / 61,778 |
| 89. | 37.20 | University Place School District / 28,694 |
| 90. | 37.40 | Snoqualmie Valley School District / 32,410 |
| 91. | 37.50 | East Valley School District (Yakima) / 15,915 |
| 91. | 37.50 | Ephrata School District / 11,057 |
| 93. | 37.60 | Northshore School District / 118,540 |
| 93. | 37.60 | Aberdeen School District / 20,276 |
| 93. | 37.60 | Wellpinit School District / 832 |
| 96. | 37.70 | Mead School District / 48,493 |
| 96. | 37.70 | Highline School District / 121,267 |
| 96. | 37.70 | Ferndale School District / 29,638 |
| 99. | 37.80 | Lakewood School District / 12,650 |
| 99. | 37.80 | Centralia School District / 23,057 |
| 99. | 37.80 | Eastmont School District / 28,616 |
| 102. | 37.90 | Tahoma School District / 34,343 |
| 102. | 37.90 | Snohomish School District / 52,629 |
| 104. | 38.10 | Riverview School District / 18,166 |
| 104. | 38.10 | Edmonds School District / 153,237 |
| 106. | 38.20 | Lind School District / 1,294 |
| 106. | 38.20 | Central Valley School District / 75,090 |
| 106. | 38.20 | Walla Walla School District / 36,442 |
| 109. | 38.40 | Granite Falls School District / 12,253 |
| 109. | 38.40 | Kelso School District / 27,392 |
| 111. | 38.50 | North Thurston Public Schools / 91,009 |
| 111. | 38.50 | Steilacoom Historical School District / 19,938 |
| 113. | 38.60 | Bellevue School District / 120,974 |
| 114. | 38.70 | Tumwater School District / 35,283 |
| 114. | 38.70 | Cashmere School District / 7,386 |
| 116. | 38.80 | Rochester School District / 12,834 |
| 116. | 38.80 | Dieringer School District / 7,566 |
| 116. | 38.80 | Richland School District / 59,225 |
| 119. | 39.00 | Hockinson School District / 8,992 |
| 120. | 39.10 | Lynden School District / 16,419 |
| 121. | 39.20 | Elma School District / 8,644 |
| 121. | 39.20 | Touchet School District / 988 |
| 121. | 39.20 | Waterville School District / 1,585 |
| 121. | 39.20 | Sedro-Woolley School District / 26,371 |
| 121. | 39.20 | Quillayute Valley School District / 6,366 |
| 126. | 39.30 | Waitsburg School District / 1,532 |
| 126. | 39.30 | Burlington-Edison School District / 19,879 |
| 126. | 39.30 | Wenatchee School District / 41,478 |
| 129. | 39.40 | Roosevelt School District / 130 |
| 129. | 39.40 | Washougal School District / 18,402 |
| 129. | 39.40 | Colfax School District / 4,153 |
| 132. | 39.50 | La Center School District / 7,614 |
| 132. | 39.50 | Entiat School District / 2,251 |
| 134. | 39.60 | South Kitsap School District / 67,702 |
| 135. | 39.70 | Palouse School District / 1,313 |
| 135. | 39.70 | Longview Public Schools / 45,487 |
| 137. | 39.80 | McCleary School District / 2,991 |
| 138. | 39.90 | Kittitas School District / 3,648 |
| 138. | 39.90 | Ocosta School District / 7,553 |
| 140. | 40.00 | Toledo School District / 4,382 |
| 140. | 40.00 | Hoquiam School District / 11,475 |
| 140. | 40.00 | Arlington School District / 29,028 |
| 143. | 40.10 | Shelton School District / 24,073 |
| 144. | 40.20 | Davenport School District / 3,082 |
| 145. | 40.30 | Oakville School District / 2,233 |
| 145. | 40.30 | Eatonville School District / 11,447 |
| 147. | 40.80 | Nine Mile Falls School District / 8,621 |
| 148. | 41.00 | Mount Baker School District / 13,049 |
| 148. | 41.00 | White River School District / 21,762 |
| 150. | 41.10 | Kiona-Benton School District / 8,017 |
| 151. | 41.40 | Adna School District / 3,733 |
| 152. | 41.50 | West Valley School District / 18,489 |
| 153. | 41.60 | Kalama School District / 5,733 |
| 153. | 41.60 | Tenino School District / 8,600 |
| 155. | 41.70 | North Kitsap School District / 44,506 |
| 156. | 41.90 | Stevenson-Carson School District / 6,203 |
| 157. | 42.00 | Okanogan School District / 5,897 |
| 158. | 42.10 | West Valley School District / 28,135 |
| 158. | 42.10 | Ridgefield School District / 13,318 |
| 158. | 42.10 | Omak School District / 11,258 |
| 161. | 42.20 | Cascade School District / 9,297 |
| 162. | 42.30 | Klickitat School District / 641 |
| 162. | 42.30 | Shoreline School District / 65,115 |
| 162. | 42.30 | Washtucna School District / 285 |
| 165. | 42.40 | Southside School District / 2,316 |
| 165. | 42.40 | Raymond School District / 4,156 |
| 167. | 42.50 | Keller School District / 544 |
| 167. | 42.50 | Damman School District / 765 |
| 167. | 42.50 | Enumclaw School District / 25,542 |
| 170. | 42.60 | White Salmon Valley School District / 6,418 |
| 171. | 42.70 | Clarkston School District / 18,644 |
| 171. | 42.70 | Great Northern School District / 900 |
| 173. | 42.80 | North River School District / 323 |
| 173. | 42.80 | Oroville School District / 4,274 |
| 175. | 43.10 | Winlock School District / 4,367 |
| 176. | 43.20 | Cosmopolis School District / 1,761 |
| 176. | 43.20 | Toutle Lake School District / 4,054 |
| 178. | 43.30 | Conway School District / 3,011 |
| 179. | 43.40 | Onalaska School District / 5,306 |
| 180. | 43.50 | Montesano School District / 8,114 |
| 180. | 43.50 | Napavine School District / 3,924 |
| 180. | 43.50 | Inchelium School District / 1,226 |
| 183. | 43.60 | Boistfort School District / 1,020 |
| 184. | 43.80 | Colville School District / 12,385 |
| 185. | 43.90 | Riverside School District / 11,035 |
| 186. | 44.00 | Wishkah Valley School District / 883 |
| 187. | 44.10 | Blaine School District / 16,421 |
| 188. | 44.20 | Rosalia School District / 1,115 |
| 189. | 44.30 | Liberty School District / 4,145 |
| 190. | 44.40 | Skamania School District / 1,037 |
| 190. | 44.40 | Rainier School District / 4,409 |
| 192. | 44.60 | Freeman School District / 3,904 |
| 193. | 44.70 | Lake Chelan School District / 7,482 |
| 193. | 44.70 | Curlew School District / 1,601 |
| 193. | 44.70 | Selkirk School District / 2,037 |
| 193. | 44.70 | North Mason School District / 14,151 |
| 197. | 44.80 | Naches Valley School District / 7,533 |
| 197. | 44.80 | Colton School District / 933 |
| 199. | 44.90 | Naselle-Grays River Valley School District / 2,334 |
| 199. | 44.90 | Tonasket School District / 6,020 |
| 201. | 45.00 | Asotin-Anatone School District / 2,764 |
| 201. | 45.00 | Republic School District / 3,509 |
| 203. | 45.10 | Peninsula School District / 55,601 |
| 204. | 45.20 | Cusick School District / 2,188 |
| 204. | 45.20 | Port Angeles School District / 30,120 |
| 204. | 45.20 | Mary Walker School District / 2,653 |
| 207. | 45.30 | Pe Ell School District / 1,476 |
| 208. | 45.50 | Castle Rock School District / 9,732 |
| 208. | 45.50 | Trout Lake School District / 961 |
| 210. | 45.60 | Grand Coulee Dam School District / 4,997 |
| 210. | 45.60 | Darrington School District / 2,681 |
| 210. | 45.60 | Centerville School District / 864 |
| 213. | 45.70 | Odessa School District / 1,653 |
| 214. | 45.80 | Concrete School District / 4,721 |
| 215. | 45.90 | Stanwood-Camano School District / 31,774 |
| 215. | 45.90 | Goldendale School District / 7,351 |
| 215. | 45.90 | Bainbridge Island School District / 22,486 |
| 218. | 46.00 | Mercer Island School District / 22,376 |
| 219. | 46.10 | Mill A School District / 697 |
| 220. | 46.20 | Easton School District / 898 |
| 221. | 46.30 | South Bend School District / 2,656 |
| 222. | 46.40 | Ritzville School District / 2,515 |
| 222. | 46.40 | Oakesdale School District / 747 |
| 224. | 46.60 | Valley School District / 1,335 |
| 224. | 46.60 | Lyle School District / 2,650 |
| 226. | 46.90 | Dayton School District / 3,734 |
| 226. | 46.90 | Mansfield School District / 652 |
| 226. | 46.90 | Chewelah School District / 5,553 |
| 226. | 46.90 | Reardan-Edwall School District / 3,754 |
| 226. | 46.90 | Soap Lake School District / 2,618 |
| 231. | 47.10 | Quilcene School District / 1,807 |
| 231. | 47.10 | Pateros School District / 1,385 |
| 231. | 47.10 | Satsop School District / 481 |
| 234. | 47.30 | Pioneer School District / 9,980 |
| 235. | 47.40 | Kettle Falls School District / 5,307 |
| 236. | 47.50 | Summit Valley School District / 845 |
| 236. | 47.50 | Griffin School District / 5,132 |
| 238. | 47.70 | Thorp School District / 1,422 |
| 239. | 47.80 | Coulee-Hartline School District / 1,334 |
| 239. | 47.80 | Evaline School District / 698 |
| 241. | 48.10 | Mossyrock School District / 4,058 |
| 241. | 48.10 | Lamont School District / 196 |
| 243. | 48.30 | Dixie School District / 431 |
| 244. | 48.40 | Index School District / 587 |
| 245. | 48.60 | Almira School District / 390 |
| 246. | 49.10 | Anacortes School District / 20,212 |
| 247. | 49.20 | Orchard Prairie School District / 729 |
| 248. | 49.30 | Columbia School District / 1,096 |
| 248. | 49.30 | Northport School District / 1,365 |
| 250. | 49.40 | Newport School District / 7,946 |
| 250. | 49.40 | Morton School District / 2,383 |
| 252. | 49.50 | Sprague School District / 694 |
| 253. | 49.60 | Wilson Creek School District / 439 |
| 254. | 49.70 | Lake Quinault School District / 1,014 |
| 254. | 49.70 | Cle Elum-Roslyn School District / 6,748 |
| 256. | 50.00 | Pomeroy School District / 2,195 |
| 257. | 50.20 | Vashon Island School District / 9,927 |
| 258. | 50.30 | Steptoe School District / 310 |
| 259. | 50.40 | Wishram School District / 366 |
| 259. | 50.40 | Wahkiakum School District / 3,198 |
| 259. | 50.40 | Crescent School District / 2,649 |
| 262. | 50.60 | La Conner School District / 4,679 |
| 262. | 50.60 | Wilbur School District / 1,279 |
| 264. | 50.70 | Mount Pleasant School District / 354 |
| 265. | 50.80 | San Juan Island School District / 8,239 |
| 266. | 51.00 | White Pass School District / 3,767 |
| 267. | 51.30 | Bickleton School District / 476 |
| 268. | 51.40 | Chimacum School District / 11,480 |
| 269. | 51.50 | Orcas Island School District / 4,700 |
| 270. | 51.90 | Harrington School District / 666 |
| 271. | 52.00 | Creston School District / 1,407 |
| 271. | 52.00 | Garfield School District / 660 |
| 271. | 52.00 | South Whidbey School District / 15,325 |
| 274. | 52.30 | St. John School District / 1,104 |
| 275. | 52.50 | Orient School District / 773 |
| 276. | 52.70 | Endicott School District / 623 |
| 276. | 52.70 | Willapa Valley School District / 2,309 |
| 278. | 52.80 | Skykomish School District / 394 |
| 279. | 53.20 | Evergreen School District (Stevens) / 403 |
| 280. | 53.50 | Methow Valley School District / 4,372 |
| 281. | 53.90 | Coupeville School District / 9,426 |
| 281. | 53.90 | Hood Canal School District / 4,468 |
| 283. | 54.00 | Onion Creek School District / 317 |
| 283. | 54.00 | Loon Lake School District / 1,683 |
| 285. | 54.60 | Grapeview School District / 2,201 |
| 286. | 54.70 | Shaw Island School District / 307 |
| 287. | 54.80 | Ocean Beach School District / 9,596 |
| 288. | 55.00 | North Beach School District / 7,010 |
| 289. | 55.10 | Port Townsend School District / 13,327 |
| 290. | 55.50 | Lopez School District / 2,305 |
| 290. | 55.50 | Sequim School District / 28,650 |
| 292. | 55.80 | LaCrosse School District / 676 |
| 293. | 57.40 | Stehekin School District / 21 |
| 294. | 58.00 | Starbuck School District / 132 |
| 295. | 60.20 | Brinnon School District / 1,117 |
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.
