| Rogers Adventist School | College Place | K-8 | 338 | 15.8 | Seventh-Day Adventist |
| Meadow Glade Adventist Elementary School | Battle Ground | K-8 | 308 | 17 | Seventh-Day Adventist |
| Upper Columbia Academy - High School | Spangle | 9-12 | 268 | 15.5 | Seventh-Day Adventist |
| Auburn Adventist Academy | Auburn | 9-12 | 261 | 13.7 | Seventh-Day Adventist |
| Cascade Christian Academy | Wenatchee | K-12 | 227 | 13.7 | Seventh-Day Adventist |
| Buena Vista SDA School | Auburn | K-8 | 221 | 20.1 | Seventh-Day Adventist |
| Northwest Christian School | Puyallup | K-8 | 204 | 13.1 | Seventh-Day Adventist |
| Puget Sound Adventist Academy | Kirkland | K-12 | 187 | 12.1 | Seventh-Day Adventist |
| Walla Walla Valley Academy | College Place | 9-12 | 133 | 12.5 | Seventh-Day Adventist |
| Columbia Adventist Academy | Battle Ground | 9-12 | 130 | 12.4 | Seventh-Day Adventist |
| Skagit Adventist Academy | Burlington | K-12 | 106 | 9.8 | Seventh-Day Adventist |
| Tri-City Adventist School | Pasco | K-10 | 98 | 14 | Seventh-Day Adventist |
| Yakima Adventist Christian School | Yakima | PreK-10 | 76 | 9.4 | Seventh-Day Adventist |
| Riverside Christian School | Washougal | K-8 | 73 | 10.3 | Seventh-Day Adventist |
| Lewis County Adventist School | Chehalis | PreK-10 | 66 | 13.2 | Seventh-Day Adventist |
| Journey Christian School | Kelso | PreK-8 | 60 | 9.8 | Seventh-Day Adventist |
| Forest Park Adventist Christian School | Everett | K-8 | 60 | 19.4 | Seventh-Day Adventist |
| Kitsap Adventist Christian School | Bremerton | K-9 | 59 | 11.6 | Seventh-Day Adventist |
| Olympia Christian School | Olympia | PreK-8 | 45 | 10.2 | Seventh-Day Adventist |
| Spokane Valley Adventist School | Spokane Valley | K-8 | 45 | 15 | Seventh-Day Adventist |
| Cypress Adventist School | Lynnwood | K-8 | 41 | 13.7 | Seventh-Day Adventist |
| Colville Valley Junior Academy | Colville | K-8 | 37 | 10.6 | Seventh-Day Adventist |
| Shelton Valley Christian School | Shelton | K-9 | 29 | 13.8 | Seventh-Day Adventist |
| Sky Valley Adventist School | Monroe | K-7 | 27 | 13.5 | Seventh-Day Adventist |
| Peninsula Adventist Elementary School | Sequim | K-8 | 25 | 8.1 | Seventh-Day Adventist |
| Crestview Christian School | Moses Lake | PreK-8 | 24 | 8 | Seventh-Day Adventist |
| Upper Columbia Academy Elementary School | Spangle | 1-8 | 23 | 11.5 | Seventh-Day Adventist |
| Poulsbo Adventist School | Poulsbo | 2-8 | 20 | 9.5 | Seventh-Day Adventist |
| Grays Harbor Adventist Christian School | Montesano | K-8 | 17 | 10.6 | Seventh-Day Adventist |
| Pend Oreille Valley Adventist School | Newport | 1-8 | 14 | 14 | Seventh-Day Adventist |
| Peaceful Valley Christian School | Tonasket | 3-6 | 9 | 9 | Seventh-Day Adventist |
| Omak Adventist Christian School | Omak | 1-7 | 8 | 8 | Seventh-Day Adventist |
| Brewster Adventist Christian School | Brewster | 4-8 | 5 | 5 | Seventh-Day Adventist |