| Seattle School District No. 1 | Seattle | PK–12 | 50,773 |
| Lake Washington School District | Redmond | PK–12 | 30,986 |
| Spokane School District | Spokane | PK–12 | 28,853 |
| Tacoma School District | Tacoma | PK–12 | 28,847 |
| Kent School District | Kent | PK–12 | 25,358 |
| Puyallup School District | Puyallup | PK–12 | 23,026 |
| Northshore School District | Bothell | PK–12 | 22,735 |
| Federal Way School District | Federal Way | PK–12 | 22,250 |
| Vancouver School District | Vancouver | PK–12 | 21,783 |
| Evergreen School District (clark) | Vancouver | PK–12 | 21,603 |
| Bethel School District | Spanaway | PK–12 | 21,450 |
| Edmonds School District | Lynnwood | PK–12 | 20,955 |
| Everett School District | Everett | PK–12 | 20,489 |
| Bellevue School District | Bellevue | PK–12 | 20,339 |
| Issaquah School District | Issaquah | PK–12 | 19,098 |
| Pasco School District | Pasco | PK–12 | 18,913 |
| Kennewick School District | Kennewick | PK–12 | 18,826 |
| Auburn School District | Auburn | PK–12 | 18,174 |
| Highline School District | Burien | PK–12 | 18,072 |
| Yakima School District | Yakima | PK–12 | 15,488 |
| Mukilteo School District | Everett | PK–12 | 15,175 |
| North Thurston Public Schools | Lacey | PK–12 | 15,167 |
| Central Valley School District | Liberty Lake | PK–12 | 15,025 |
| Renton School District | Renton | PK–12 | 14,873 |
| Richland School District | West Richland | PK–12 | 14,410 |
| Battle Ground School District | Battle Ground | PK–12 | 12,754 |
| Clover Park School District | Lakewood | PK–12 | 12,345 |
| Bellingham School District | Bellingham | PK–12 | 11,337 |
| Central Kitsap School District | Bremerton | PK–12 | 11,100 |
| Sumner-Bonney Lake School District | Sumner | PK–12 | 10,743 |
| Mead School District | Mead | PK–12 | 10,657 |
| Lake Stevens School District | Lake Stevens | PK–12 | 10,117 |
| Marysville School District | Marysville | PK–12 | 9,760 |
| Snohomish School District | Snohomish | PK–12 | 9,732 |
| Shoreline School District | Shoreline | PK–12 | 9,717 |
| Olympia School District | Olympia | PK–12 | 9,386 |
| South Kitsap School District | Port Orchard | PK–12 | 9,326 |
| Tahoma School District | Maple Valley | PK–12 | 9,234 |
| Peninsula School District | Gig Harbor | PK–12 | 9,015 |
| Moses Lake School District | Moses Lake | PK–12 | 8,430 |
| Camas School District | Camas | PK–12 | 7,239 |
| Franklin Pierce School District | Tacoma | PK–12 | 7,187 |
| Snoqualmie Valley School District | Snoqualmie | PK–12 | 7,145 |
| Wenatchee School District | Wenatchee | PK–12 | 7,073 |
| Longview School District | Longview | PK–12 | 6,382 |
| Tumwater School District | Tumwater | PK–12 | 6,350 |
| Mount Vernon School District | Mount Vernon | PK–12 | 6,326 |
| Sunnyside School District | Sunnyside | PK–12 | 6,151 |
| Eastmont School District | East Wenatchee | PK–12 | 5,930 |
| Monroe School District | Monroe | PK–12 | 5,874 |
| Omak School District | Omak | PK–12 | 5,873 |
| Yelm School District | Yelm | PK–12 | 5,671 |
| Cheney School District | Cheney | PK–12 | 5,662 |
| University Place School District | University Place | PK–12 | 5,635 |
| Oak Harbor School District | Oak Harbor | PK–12 | 5,635 |
| Arlington School District | Arlington | PK–12 | 5,588 |
| West Valley School District (yakima) | Yakima | PK–12 | 5,480 |
| Walla Walla Public Schools | Walla Walla | PK–12 | 5,410 |
| North Kitsap School District | Poulsbo | PK–12 | 5,330 |
| Kelso School District | Kelso | PK–12 | 4,960 |
| Stanwood-Camano School District | Stanwood | PK–12 | 4,880 |
| Ferndale School District | Ferndale | PK–12 | 4,746 |
| Othello School District | Othello | PK–12 | 4,654 |
| Sedro-Woolley School District | Sedro Woolley | PK–12 | 4,600 |
| Enumclaw School District | Enumclaw | PK–12 | 4,542 |
| Shelton School District | Shelton | PK–12 | 4,517 |
| White River School District | Buckley | PK–12 | 4,475 |
| Bremerton School District | Bremerton | PK–12 | 4,383 |
| Ridgefield School District | Ridgefield | PK–12 | 4,297 |
| Mercer Island School District | Mercer Island | PK–12 | 3,993 |
| Fife School District | Milton | PK–12 | 3,983 |
| Selah School District | Selah | PK–12 | 3,784 |
| Quillayute Valley School District | Forks | K–12 | 3,760 |
| Toppenish School District | Toppenish | PK–12 | 3,646 |
| Lynden School District | Lynden | PK–12 | 3,646 |
| East Valley School District (spokane) | Spokane | PK–12 | 3,601 |
| Grandview School District | Grandview | PK–12 | 3,583 |
| Bainbridge Island School District | Bainbridge Island | PK–12 | 3,514 |
| West Valley School District (spokane) | Spokane | PK–12 | 3,475 |
| Port Angeles School District | Port Angeles | PK–12 | 3,460 |
| Ellensburg School District | Ellensburg | PK–12 | 3,408 |
| East Valley School District (yakima) | Yakima | PK–12 | 3,387 |
| Centralia School District | Centralia | PK–12 | 3,313 |
| Burlington-Edison School District | Burlington | PK–12 | 3,276 |
| Wapato School District | Wapato | PK–12 | 3,198 |
| Aberdeen School District | Aberdeen | PK–12 | 3,183 |
| Quincy School District | Quincy | K–12 | 3,162 |
| Chehalis School District | Chehalis | PK–12 | 3,142 |
| Goldendale School District | Goldendale | PK–12 | 3,013 |
| Steilacoom Hist. School District | Steilacoom | PK–12 | 3,005 |
| Riverview School District | Duvall | PK–12 | 2,996 |
| Tukwila School District | Tukwila | PK–12 | 2,886 |
| Ephrata School District | Ephrata | PK–12 | 2,833 |
| Orting School District | Orting | PK–12 | 2,809 |
| Deer Park School District | Deer Park | PK–12 | 2,783 |
| Pullman School District | Pullman | PK–12 | 2,731 |
| Lakewood School District | Marysville | PK–12 | 2,713 |
| Washougal School District | Washougal | PK–12 | 2,687 |
| Anacortes School District | Anacortes | PK–12 | 2,595 |
| Sequim School District | Sequim | PK–12 | 2,580 |
| Prosser School District | Prosser | PK–12 | 2,534 |
| Clarkston School District | Clarkston | PK–12 | 2,495 |
| Wahluke School District | Mattawa | PK–12 | 2,455 |
| Woodland School District | Woodland | PK–12 | 2,429 |
| Granite Falls School District | Granite Falls | PK–12 | 2,355 |
| North Mason School District | Belfair | PK–12 | 2,337 |
| Rochester School District | Rochester | PK–12 | 2,175 |
| Sultan School District | Sultan | PK–12 | 2,139 |
| North Franklin School District | Connell | PK–12 | 2,078 |
| Hockinson School District | Brush Prairie | K–12 | 2,061 |
| Nooksack Valley School District | Everson | PK–12 | 2,033 |
| Eatonville School District | Eatonville | K–12 | 1,995 |
| Blaine School District | Blaine | PK–12 | 1,983 |
| Meridian School District | Bellingham | PK–12 | 1,904 |
| Medical Lake School District | Medical Lake | PK–12 | 1,842 |
| La Center School District | La Center | PK–12 | 1,823 |
| Royal School District | Royal City | PK–12 | 1,769 |
| Colville School District | Colville | PK–12 | 1,737 |
| Cashmere School District | Cashmere | PK–12 | 1,677 |
| Elma School District | Elma | PK–12 | 1,677 |
| Mount Baker School District | Deming | PK–12 | 1,580 |
| Riverside School District | Chattaroy | PK–12 | 1,570 |
| Hoquiam School District | Hoquiam | PK–12 | 1,566 |
| College Place School District | College Place | PK–12 | 1,531 |
| Castle Rock School District | Castle Rock | PK–12 | 1,484 |
| Vashon Island School District | Vashon | PK–12 | 1,468 |
| Nine Mile Falls School District | Nine Mile Falls | PK–12 | 1,440 |
| Granger School District | Granger | PK–12 | 1,438 |
| Montesano School District | Montesano | PK–12 | 1,433 |
| Dieringer School District | Lake Tapps | K–8 | 1,424 |
| Kiona-Benton City School District | Benton City | PK–12 | 1,395 |
| Zillah School District | Zillah | PK–12 | 1,330 |
| Naches Valley School District | Naches | K–12 | 1,308 |
| Lake Chelan School District | Chelan | PK–12 | 1,299 |
| Tenino School District | Tenino | PK–12 | 1,283 |
| Port Townsend School District | Port Townsend | PK–12 | 1,277 |
| Cascade School District | Leavenworth | PK–12 | 1,258 |
| South Whidbey School District | Langley | PK–12 | 1,207 |
| Newport School District | Newport | PK–12 | 1,181 |
| Kalama School District | Kalama | K–12 | 1,138 |
| Kettle Falls School District | Kettle Falls | PK–12 | 1,116 |
| Tonasket School District | Tonasket | PK–12 | 1,104 |
| South Bend School District | South Bend | K–12 | 1,102 |
| Valley School District | Valley | PK–12 | 1,099 |
| White Salmon Valley School District | White Salmon | K–12 | 1,078 |
| Highland School District | Cowiche | PK–12 | 1,060 |
| Okanogan School District | Okanogan | K–12 | 1,041 |
| Cle Elum-Roslyn School District | Cle Elum | PK–12 | 1,026 |
| Rainier School District | Rainier | PK–12 | 1,017 |
| Brewster School District | Brewster | PK–12 | 1,001 |
| Coupeville School District | Coupeville | PK–12 | 952 |
| Ocean Beach School District | Long Beach | PK–12 | 942 |
| Warden School District | Warden | PK–12 | 933 |
| Onalaska School District | Onalaska | PK–12 | 913 |
| Toledo School District | Toledo | PK–12 | 906 |
| Finley School District | Kennewick | PK–12 | 892 |
| Freeman School District | Rockford | PK–12 | 887 |
| Mount Adams School District | White Swan | PK–12 | 839 |
| Spokane International Academy | Spokane | K–12 | 824 |
| Napavine School District | Napavine | PK–12 | 821 |
| Orcas Island School District | Eastsound | K–12 | 807 |
| Winlock School District | Winlock | PK–12 | 801 |
| Chewelah School District | Chewelah | K–12 | 799 |
| San Juan Island School District | Friday Harbor | K–12 | 797 |
| Methow Valley School District | Winthrop | PK–12 | 785 |
| Mary M Knight School District | Elma | PK–12 | 784 |
| Columbia (walla Walla) School District | Burbank | K–12 | 776 |
| Bridgeport School District | Bridgeport | PK–12 | 772 |
| Starbuck School District | Starbuck | K–12 | 765 |
| Stevenson-Carson School District | Stevenson | PK–12 | 755 |
| Mabton School District | Mabton | K–12 | 735 |
| Pioneer School District | Shelton | PK–8 | 732 |
| Reardan-Edwall School District | Reardan | K–12 | 725 |
| Chimacum School District | Chimacum | PK–12 | 704 |
| Grand Coulee Dam School District | Coulee Dam | PK–12 | 695 |
| Davenport School District | Davenport | PK–12 | 687 |
| Toutle Lake School District | Toutle | K–12 | 673 |
| Asotin-Anatone School District | Asotin | PK–12 | 657 |
| Mossyrock School District | Mossyrock | K–12 | 644 |
| North Beach School District No. 64 | Ocean Shores | PK–12 | 638 |
| Manson School District | Manson | PK–12 | 637 |
| Adna School District | Adna | PK–12 | 634 |
| Chief Leschi School | Puyallup | K–12 | 633 |
| Liberty School District | Spangle | PK–12 | 605 |
| Ocosta School District | Westport | PK–12 | 600 |
| Soap Lake School District | Soap Lake | PK–12 | 591 |
| Griffin School District | Olympia | PK–8 | 585 |
| Quilcene School District | Quilcene | PK–12 | 580 |
| Kittitas School District | Kittitas | PK–12 | 577 |
| Summit Public School: Atlas | Seattle | 6–12 | 566 |
| Union Gap School District | Union Gap | PK–8 | 558 |
| Mary Walker School District | Springdale | PK–12 | 558 |
| Oroville School District | Oroville | PK–12 | 541 |
| Republic School District | Republic | K–12 | 540 |
| Colfax School District | Colfax | K–12 | 533 |
| Concrete School District | Concrete | PK–12 | 528 |
| Impact | Puget Sound Elementary | Tukwila | K–5 | 505 |
| Catalyst Public Schools | Bremerton | K–9 | 504 |
| Cape Flattery School District | Sekiu | PK–12 | 490 |
| Raymond School District | Raymond | PK–12 | 485 |
| La Conner School District | La Conner | K–12 | 485 |
| Muckleshoot Tribal School | Auburn | K–12 | 471 |
| Darrington School District | Darrington | PK–12 | 464 |
| Entiat School District | Entiat | PK–12 | 436 |
| Conway School District | Mount Vernon | K–8 | 421 |
| Wellpinit School District #49 | Wellpinit | K–12 | 415 |
| Ritzville School District | Ritzville | PK–12 | 415 |
| Wahkiakum School District | Cathlamet | K–12 | 399 |
| Morton School District | Morton | PK–12 | 399 |
| Cusick School District | Cusick | K–12 | 392 |
| Impact | Salish Sea Elementary | Seattle | K–5 | 385 |
| Dayton School District | Dayton | PK–12 | 379 |
| Crescent School District | Joyce | K–12 | 372 |
| Renton Technical College | Renton | 11–12 | 362 |
| Rainier Prep Charter School District | Seattle | 5–8 | 359 |
| Educational Service District 123 | Pasco | 9–12 | 353 |
| White Pass School District | Randle | K–12 | 352 |
| Capital Region Esd 113 | Tumwater | 11–12 | 344 |
| Willapa Valley School District | Menlo | K–12 | 344 |
| Bates Technical College | Tacoma | 9–12 | 343 |
| Pomeroy School District | Pomeroy | PK–12 | 343 |
| Hood Canal School District | Shelton | PK–8 | 337 |
| Mccleary School District | Mccleary | PK–8 | 332 |
| Oakville School District | Oakville | PK–12 | 320 |
| Naselle-Grays River Valley School District | Naselle | K–12 | 316 |
| Waitsburg School District | Waitsburg | PK–12 | 309 |
| Lummi Nation Tribal School | Bellingham | K–8 | 297 |
| Curlew School District | Curlew | PK–12 | 292 |
| Pe Ell School District | Pe Ell | PK–12 | 284 |
| Boistfort School District | Curtis | PK–12 | 284 |
| Waterville School District | Waterville | K–12 | 256 |
| Selkirk School District | Metaline Falls | PK–12 | 252 |
| Touchet School District | Touchet | K–12 | 251 |
| Loon Lake School District | Loon Lake | PK–8 | 251 |
| Thorp School District | Thorp | K–12 | 247 |
| Pinnacles Prep Charter School | Wenatchee | 6–10 | 234 |
| Pride Prep Charter School District | Spokane | 9–12 | 232 |
| Impact | Commencement Bay Elementary | Tacoma | PK–5 | 232 |
| Pateros School District | Pateros | PK–12 | 231 |
| Wilbur School District | Wilbur | K–12 | 226 |
| Prescott School District | Prescott | PK–12 | 225 |
| Grapeview School District | Grapeview | K–8 | 224 |
| Odessa School District | Odessa | PK–12 | 224 |
| Summit Public School: Sierra | Seattle | 9–12 | 214 |
| Impact | Black River Elementary | Renton | K–5 | 209 |
| Trout Lake School District | Trout Lake | K–12 | 209 |
| Southside School District | Shelton | K–7 | 208 |
| Lake Quinault School District | Amanda Park | K–12 | 207 |
| Tekoa School District | Tekoa | PK–12 | 206 |
| Lopez School District | Lopez Island | K–12 | 205 |
| Lyle School District | Lyle | K–12 | 196 |
| Taholah School District | Taholah | K–12 | 192 |
| Palouse School District | Palouse | PK–12 | 191 |
| Inchelium School District | Inchelium | K–12 | 188 |
| Northport School District | Northport | K–12 | 185 |
| Wishkah Valley School District | Aberdeen | K–12 | 178 |
| Carbonado School District | Carbonado | K–8 | 176 |
| Cosmopolis School District | Cosmopolis | K–6 | 175 |
| Lind School District | Lind | PK–12 | 170 |
| Coulee-Hartline School District | Coulee City | K–12 | 170 |
| Educational Service District 101 | Spokane | 6–12 | 168 |
| Colton School District | Colton | PK–12 | 166 |
| Green Mountain School District | Woodland | K–8 | 163 |
| Rosalia School District | Rosalia | PK–12 | 163 |
| Oakesdale School District | Oakesdale | PK–12 | 153 |
| Yakama Nation Tribal School | Toppenish | 8–12 | 152 |
| Paschal Sherman Indian School | Omak | K–9 | 150 |
| Nespelem School District | Nespelem | PK–10 | 150 |
| St. John School District | Saint John | PK–12 | 145 |
| Lake Washington Institute of Technology | Kirkland | 11–12 | 143 |
| Lummi High School | Bellingham | 9–12 | 142 |
| Paterson School District | Paterson | K–8 | 134 |
| Wa He Lut Indian School | Olympia | K–8 | 131 |
| Almira School District | Almira | K–8 | 129 |
| Washington Center for Deaf and Hard of Hearing Youth | Vancouver | PK–12 | 127 |
| Garfield School District | Garfield | PK–12 | 127 |
| Why Not You Academy | Des Moines | 9–12 | 126 |
| Orondo School District | Orondo | PK–8 | 124 |
| Columbia (stevens) School District | Hunters | PK–12 | 121 |
| Rainier Valley Leadership Academy | Seattle | 6–12 | 121 |
| Educational Service District 105 | Yakima | 9–12 | 120 |
| Wilson Creek School District | Wilson Creek | K–12 | 118 |
| Harrington School District | Harrington | K–12 | 114 |
| Summit Public School: Olympus | Tacoma | 9–12 | 110 |
| Summit Valley School District | Addy | PK–8 | 108 |
| Skamania School District | Skamania | K–8 | 108 |
| Intergenerational High School | Bellingham | 9–12 | 107 |
| Mansfield School District | Mansfield | PK–12 | 107 |
| Wishram School District | Wishram | PK–12 | 91 |
| Centerville School District | Centerville | K–8 | 91 |
| Bickleton School District | Bickleton | K–12 | 91 |
| Quileute Tribal School | La Push | K–12 | 87 |
| Endicott School District | Endicott | PK–8 | 83 |
| Easton School District | Easton | K–12 | 81 |
| Orchard Prairie School District | Spokane | K–7 | 79 |
| Northwest Educational Service District 189 | Anacortes | 6–12 | 79 |
| Educational Service District 112 | Vancouver | 3–12 | 75 |
| Suquamish Tribal Education Department | Poulsbo | K–12 | 74 |
| Creston School District | Creston | K–12 | 73 |
| Brinnon School District | Brinnon | K–8 | 72 |