| Rank | Median Age ▲ | School District / Population |
| 1. | 12.60 | Star School District / 212 |
| 2. | 22.10 | Pullman School District / 31,997 |
| 3. | 23.80 | Paterson School District / 513 |
| 4. | 24.00 | Wahluke School District / 7,439 |
| 5. | 24.50 | Kahlotus School District / 523 |
| 6. | 25.10 | Granger School District / 5,227 |
| 7. | 25.70 | Toppenish School District / 15,684 |
| 8. | 25.90 | Othello School District / 14,317 |
| 9. | 26.10 | Royal School District / 6,130 |
| 10. | 26.30 | Ellensburg School District / 26,752 |
| 11. | 26.70 | Wapato School District / 14,114 |
| 12. | 26.90 | Prescott School District / 1,841 |
| 13. | 27.10 | Sunnyside School District / 24,062 |
| 14. | 27.50 | Grandview School District / 15,786 |
| 15. | 28.20 | Quincy School District / 12,355 |
| 16. | 28.30 | Mount Adams School District / 4,046 |
| 16. | 28.30 | Pasco School District / 68,812 |
| 18. | 28.70 | Green Mountain School District / 948 |
| 19. | 29.20 | Clover Park School District / 80,097 |
| 20. | 29.60 | Mabton School District / 3,444 |
| 21. | 29.80 | Union Gap School District / 3,322 |
| 22. | 30.10 | North Franklin School District / 9,034 |
| 23. | 30.50 | Bridgeport School District / 3,446 |
| 23. | 30.50 | Warden School District / 4,161 |
| 25. | 30.70 | Roosevelt School District / 257 |
| 26. | 30.90 | Taholah School District / 831 |
| 27. | 31.00 | Medical Lake School District / 11,439 |
| 28. | 31.30 | Cheney School District / 32,224 |
| 29. | 31.40 | Palisades School District / 306 |
| 29. | 31.40 | Brewster School District / 4,351 |
| 31. | 31.50 | Queets-Clearwater School District / 741 |
| 32. | 31.90 | Oak Harbor School District / 37,740 |
| 32. | 31.90 | Yakima School District / 77,416 |
| 34. | 32.00 | Nooksack Valley School District / 10,432 |
| 35. | 32.40 | Carbonado School District / 812 |
| 35. | 32.40 | Tukwila School District / 17,944 |
| 37. | 32.60 | Cape Flattery School District / 3,173 |
| 38. | 32.90 | Benge School District / 117 |
| 38. | 32.90 | Moses Lake School District / 40,863 |
| 38. | 32.90 | Bremerton School District / 45,796 |
| 41. | 33.00 | Franklin Pierce School District / 50,105 |
| 42. | 33.10 | Mount Vernon School District / 37,552 |
| 43. | 33.20 | Mukilteo School District / 92,909 |
| 43. | 33.20 | College Place School District / 13,050 |
| 45. | 33.30 | Bellingham School District / 102,129 |
| 46. | 33.60 | Kennewick School District / 86,026 |
| 47. | 33.70 | Bethel School District / 101,552 |
| 48. | 34.30 | Orondo School District / 1,405 |
| 49. | 34.50 | Oakville School District / 2,414 |
| 50. | 34.60 | Lake Stevens School District / 39,454 |
| 50. | 34.60 | Nespelem School District / 957 |
| 52. | 34.80 | Wellpinit School District / 884 |
| 52. | 34.80 | Prosser School District / 12,971 |
| 54. | 35.10 | Highland School District / 5,240 |
| 55. | 35.20 | Battle Ground School District / 63,300 |
| 56. | 35.30 | Woodland School District / 11,259 |
| 57. | 35.40 | Manson School District / 3,592 |
| 57. | 35.40 | Yelm Community Schools / 28,149 |
| 57. | 35.40 | Evergreen School District (Clark) / 140,938 |
| 60. | 35.60 | Orting School District / 13,705 |
| 60. | 35.60 | Zillah School District / 4,780 |
| 60. | 35.60 | Dieringer School District / 8,622 |
| 63. | 35.70 | Kent School District / 151,786 |
| 63. | 35.70 | Auburn School District / 84,460 |
| 63. | 35.70 | Spokane Public Schools / 220,197 |
| 66. | 35.80 | Tacoma Public Schools / 209,499 |
| 66. | 35.80 | Marysville School District / 70,248 |
| 66. | 35.80 | Federal Way School District / 131,459 |
| 69. | 36.10 | Seattle School District / 613,622 |
| 70. | 36.20 | Centralia School District / 22,416 |
| 70. | 36.20 | Sumner School District / 43,601 |
| 70. | 36.20 | East Valley School District (Spokane) / 26,142 |
| 73. | 36.40 | Lake Washington School District / 182,099 |
| 73. | 36.40 | Renton School District / 116,522 |
| 75. | 36.50 | Fife Public Schools / 20,369 |
| 76. | 36.60 | Puyallup School District / 121,401 |
| 76. | 36.60 | Everett School District / 128,974 |
| 78. | 36.70 | Davenport School District / 3,279 |
| 78. | 36.70 | Central Kitsap School District / 67,891 |
| 78. | 36.70 | Ephrata School District / 10,759 |
| 81. | 37.00 | Selah School District / 17,722 |
| 81. | 37.00 | Highline School District / 120,110 |
| 83. | 37.20 | Columbia School District / 3,646 |
| 83. | 37.20 | North Thurston Public Schools / 94,489 |
| 83. | 37.20 | Monroe School District / 38,539 |
| 86. | 37.30 | Vancouver Public Schools / 143,172 |
| 86. | 37.30 | Summit Valley School District / 832 |
| 88. | 37.40 | Palouse School District / 1,390 |
| 88. | 37.40 | Steilacoom Historical School District / 20,739 |
| 90. | 37.50 | Mead School District / 51,164 |
| 90. | 37.50 | Camas School District / 29,035 |
| 92. | 37.60 | University Place School District / 29,676 |
| 93. | 37.70 | Issaquah School District / 104,350 |
| 94. | 37.80 | East Valley School District (Yakima) / 14,991 |
| 94. | 37.80 | Kittitas School District / 4,054 |
| 96. | 37.90 | Eastmont School District / 29,715 |
| 96. | 37.90 | McCleary School District / 2,994 |
| 96. | 37.90 | Aberdeen School District / 20,478 |
| 99. | 38.20 | Meridian School District / 9,760 |
| 99. | 38.20 | Glenwood School District / 533 |
| 99. | 38.20 | Sultan School District / 13,293 |
| 102. | 38.30 | Granite Falls School District / 12,787 |
| 103. | 38.40 | Bellevue School District / 123,980 |
| 104. | 38.50 | Walla Walla School District / 37,242 |
| 104. | 38.50 | Rochester School District / 14,228 |
| 104. | 38.50 | Lynden School District / 17,746 |
| 104. | 38.50 | Mill A School District / 632 |
| 104. | 38.50 | Olympia School District / 62,294 |
| 104. | 38.50 | Washougal School District / 19,774 |
| 104. | 38.50 | Tahoma School District / 37,682 |
| 104. | 38.50 | Northshore School District / 123,771 |
| 104. | 38.50 | Edmonds School District / 156,223 |
| 113. | 38.60 | Snoqualmie Valley School District / 34,844 |
| 114. | 38.70 | Tumwater School District / 36,815 |
| 114. | 38.70 | Richland School District / 62,785 |
| 114. | 38.70 | Wenatchee School District / 41,908 |
| 117. | 38.80 | Kelso School District / 27,698 |
| 117. | 38.80 | Lakewood School District / 13,082 |
| 119. | 39.00 | Ritzville School District / 2,766 |
| 120. | 39.10 | Naselle-Grays River Valley School District / 2,754 |
| 121. | 39.20 | Finley School District / 4,525 |
| 121. | 39.20 | Ocosta School District / 7,399 |
| 121. | 39.20 | White River School District / 20,934 |
| 124. | 39.30 | Ferndale School District / 30,082 |
| 125. | 39.40 | Waitsburg School District / 1,473 |
| 126. | 39.50 | Deer Park School District / 10,394 |
| 126. | 39.50 | Touchet School District / 1,026 |
| 126. | 39.50 | Tenino School District / 9,689 |
| 126. | 39.50 | Hoquiam School District / 11,341 |
| 130. | 39.60 | Central Valley School District / 76,352 |
| 130. | 39.60 | South Kitsap School District / 68,230 |
| 130. | 39.60 | Waterville School District / 1,949 |
| 130. | 39.60 | Chehalis School District / 15,013 |
| 134. | 39.70 | Snohomish School District / 52,346 |
| 135. | 39.80 | Kiona-Benton School District / 8,079 |
| 135. | 39.80 | Elma School District / 8,226 |
| 137. | 39.90 | Napavine School District / 4,359 |
| 138. | 40.00 | Arlington School District / 30,237 |
| 138. | 40.00 | Shelton School District / 23,795 |
| 138. | 40.00 | Cashmere School District / 7,989 |
| 141. | 40.10 | Quillayute Valley School District / 6,545 |
| 141. | 40.10 | Riverview School District / 19,166 |
| 141. | 40.10 | West Valley School District / 19,410 |
| 144. | 40.20 | La Center School District / 8,370 |
| 145. | 40.40 | Burlington-Edison School District / 20,403 |
| 145. | 40.40 | Boistfort School District / 964 |
| 147. | 40.80 | Winlock School District / 5,083 |
| 148. | 40.90 | Sedro-Woolley School District / 26,040 |
| 148. | 40.90 | Colfax School District / 4,006 |
| 150. | 41.00 | Lake Chelan School District / 7,474 |
| 151. | 41.10 | Darrington School District / 3,028 |
| 152. | 41.20 | West Valley School District / 29,055 |
| 152. | 41.20 | Hockinson School District / 8,945 |
| 154. | 41.30 | Omak School District / 10,711 |
| 154. | 41.30 | Entiat School District / 2,694 |
| 156. | 41.40 | Klickitat School District / 744 |
| 156. | 41.40 | Longview Public Schools / 45,733 |
| 158. | 41.50 | Liberty School District / 4,540 |
| 159. | 41.70 | Kalama School District / 6,438 |
| 159. | 41.70 | Keller School District / 389 |
| 161. | 41.90 | Okanogan School District / 5,347 |
| 162. | 42.20 | Shoreline School District / 65,974 |
| 163. | 42.40 | Tekoa School District / 908 |
| 164. | 42.50 | Colton School District / 1,183 |
| 164. | 42.50 | Mount Baker School District / 14,586 |
| 164. | 42.50 | Blaine School District / 16,551 |
| 167. | 42.70 | White Salmon Valley School District / 6,901 |
| 168. | 42.80 | Goldendale School District / 7,490 |
| 169. | 42.90 | Clarkston School District / 18,810 |
| 169. | 42.90 | Mary Walker School District / 3,251 |
| 171. | 43.00 | North Kitsap School District / 46,260 |
| 171. | 43.00 | Castle Rock School District / 9,955 |
| 171. | 43.00 | Wishkah Valley School District / 942 |
| 174. | 43.10 | Enumclaw School District / 26,239 |
| 174. | 43.10 | Adna School District / 3,905 |
| 174. | 43.10 | Nine Mile Falls School District / 8,100 |
| 177. | 43.20 | Satsop School District / 638 |
| 178. | 43.40 | Riverside School District / 11,578 |
| 179. | 43.50 | Lind School District / 1,018 |
| 179. | 43.50 | North River School District / 297 |
| 179. | 43.50 | Reardan-Edwall School District / 4,881 |
| 182. | 43.60 | Toledo School District / 4,635 |
| 182. | 43.60 | Toutle Lake School District / 3,346 |
| 184. | 43.70 | Ridgefield School District / 13,779 |
| 184. | 43.70 | Eatonville School District / 11,515 |
| 186. | 43.90 | Tonasket School District / 7,582 |
| 186. | 43.90 | Bickleton School District / 575 |
| 188. | 44.00 | Inchelium School District / 1,067 |
| 189. | 44.20 | Damman School District / 745 |
| 190. | 44.30 | Wilson Creek School District / 490 |
| 190. | 44.30 | Rosalia School District / 1,123 |
| 190. | 44.30 | Colville School District / 12,141 |
| 193. | 44.40 | Lamont School District / 197 |
| 194. | 44.60 | Freeman School District / 3,788 |
| 194. | 44.60 | South Bend School District / 2,373 |
| 196. | 44.80 | Oakesdale School District / 910 |
| 197. | 44.90 | Port Angeles School District / 30,177 |
| 197. | 44.90 | Naches Valley School District / 8,317 |
| 199. | 45.10 | Conway School District / 3,237 |
| 199. | 45.10 | Stevenson-Carson School District / 5,891 |
| 199. | 45.10 | Southside School District / 2,211 |
| 202. | 45.20 | Grand Coulee Dam School District / 5,172 |
| 202. | 45.20 | Peninsula School District / 60,673 |
| 204. | 45.30 | Cascade School District / 8,952 |
| 204. | 45.30 | Mary M. Knight School District / 1,616 |
| 206. | 45.50 | Pe Ell School District / 1,490 |
| 206. | 45.50 | Great Northern School District / 978 |
| 206. | 45.50 | Montesano School District / 8,349 |
| 209. | 45.70 | Cosmopolis School District / 1,918 |
| 210. | 45.90 | Stanwood-Camano School District / 32,782 |
| 211. | 46.10 | Republic School District / 3,818 |
| 212. | 46.20 | Pateros School District / 1,412 |
| 212. | 46.20 | Asotin-Anatone School District / 2,920 |
| 214. | 46.50 | Rainier School District / 4,437 |
| 214. | 46.50 | Mercer Island School District / 22,922 |
| 216. | 46.70 | North Mason School District / 14,497 |
| 217. | 47.00 | Soap Lake School District / 3,041 |
| 218. | 47.10 | St. John School District / 1,130 |
| 219. | 47.40 | Valley School District / 1,419 |
| 220. | 47.50 | Concrete School District / 4,848 |
| 220. | 47.50 | Skamania School District / 913 |
| 222. | 47.70 | Bainbridge Island School District / 22,933 |
| 223. | 47.80 | Raymond School District / 3,937 |
| 223. | 47.80 | Almira School District / 445 |
| 225. | 47.90 | Coulee-Hartline School District / 1,255 |
| 226. | 48.00 | Easton School District / 972 |
| 227. | 48.10 | Newport School District / 8,007 |
| 227. | 48.10 | Grapeview School District / 2,901 |
| 229. | 48.20 | Dayton School District / 3,837 |
| 229. | 48.20 | Cle Elum-Roslyn School District / 6,815 |
| 231. | 48.30 | Wishram School District / 409 |
| 232. | 48.40 | Mansfield School District / 452 |
| 233. | 48.60 | Oroville School District / 4,076 |
| 234. | 48.70 | Pioneer School District / 9,722 |
| 234. | 48.70 | Dixie School District / 420 |
| 234. | 48.70 | Index School District / 507 |
| 234. | 48.70 | Chewelah School District / 5,802 |
| 238. | 48.80 | Orchard Prairie School District / 713 |
| 238. | 48.80 | Odessa School District / 1,390 |
| 238. | 48.80 | Mossyrock School District / 4,168 |
| 238. | 48.80 | Onalaska School District / 4,820 |
| 242. | 48.90 | Orient School District / 773 |
| 242. | 48.90 | Mount Pleasant School District / 348 |
| 244. | 49.40 | Thorp School District / 1,544 |
| 244. | 49.40 | Griffin School District / 5,879 |
| 246. | 49.50 | Anacortes School District / 20,273 |
| 247. | 49.60 | Kettle Falls School District / 5,601 |
| 248. | 49.70 | Cusick School District / 2,172 |
| 249. | 49.80 | Centerville School District / 763 |
| 249. | 49.80 | Willapa Valley School District / 2,432 |
| 249. | 49.80 | Steptoe School District / 353 |
| 249. | 49.80 | Northport School District / 1,500 |
| 253. | 50.10 | Quilcene School District / 1,772 |
| 253. | 50.10 | Lyle School District / 2,708 |
| 253. | 50.10 | Selkirk School District / 2,105 |
| 256. | 50.30 | Sprague School District / 671 |
| 256. | 50.30 | Methow Valley School District / 4,751 |
| 258. | 50.50 | Washtucna School District / 232 |
| 258. | 50.50 | Curlew School District / 1,389 |
| 258. | 50.50 | Crescent School District / 2,713 |
| 261. | 50.70 | Evaline School District / 746 |
| 261. | 50.70 | San Juan Island School District / 8,050 |
| 263. | 50.80 | Skykomish School District / 458 |
| 264. | 51.10 | Vashon Island School District / 10,854 |
| 265. | 51.40 | La Conner School District / 4,663 |
| 266. | 51.60 | Trout Lake School District / 819 |
| 267. | 51.70 | Columbia School District / 1,050 |
| 268. | 52.60 | Harrington School District / 546 |
| 269. | 52.70 | White Pass School District / 4,160 |
| 269. | 52.70 | Wilbur School District / 1,190 |
| 271. | 52.80 | Endicott School District / 557 |
| 271. | 52.80 | Garfield School District / 666 |
| 273. | 52.90 | Pomeroy School District / 2,174 |
| 273. | 52.90 | Orcas Island School District / 5,017 |
| 275. | 53.10 | Evergreen School District (Stevens) / 369 |
| 276. | 53.20 | South Whidbey School District / 15,666 |
| 277. | 53.90 | Morton School District / 2,381 |
| 278. | 54.00 | Lake Quinault School District / 923 |
| 278. | 54.00 | Chimacum School District / 11,434 |
| 280. | 54.10 | Wahkiakum School District / 2,758 |
| 281. | 54.90 | Port Townsend School District / 13,955 |
| 282. | 55.00 | Coupeville School District / 9,715 |
| 282. | 55.00 | Hood Canal School District / 5,424 |
| 284. | 55.50 | Ocean Beach School District / 9,752 |
| 284. | 55.50 | Onion Creek School District / 354 |
| 284. | 55.50 | Loon Lake School District / 1,632 |
| 287. | 55.80 | LaCrosse School District / 639 |
| 288. | 56.50 | Sequim School District / 29,439 |
| 289. | 56.60 | North Beach School District / 7,162 |
| 290. | 57.90 | Lopez School District / 2,399 |
| 291. | 58.60 | Brinnon School District / 1,264 |
| 292. | 58.90 | Starbuck School District / 109 |
| 293. | 59.00 | Shaw Island School District / 274 |
| 294. | 59.10 | Creston School District / 1,041 |
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.
