| Name |
County |
| Calvary Academy |
Lewis County |
| Calvary Christian School |
Benton County |
| Calvary Lutheran Preschool and Kindergarten |
King County |
| Cam Academy |
Clark County |
| Camano Lutheran Preschool and Kindergarten |
Island County |
| Camas Montessori School |
Clark County |
| Capital Montessori School |
Thurston County |
| Carbonado Historical School 19 |
Pierce County |
| Carden Country School |
Kitsap County |
| Carpe Diem Primary School |
King County |
| Carriage Crest Elementary School |
King County |
| Cascade Christian Academy |
Chelan County |
| Cascade Christian Schools - Junior - Senior High School |
Pierce County |
| Cascade Elementary School |
King County |
| Cascade K - 8 Community School |
King County |
| Cascade K - 8 Community School |
King County |
| Cascade Montessori Middle School |
Whatcom County |
| Cascade Vista Baptist School |
King County |
| Cascadia Montessori School |
Clark County |
| Cataldo Catholic School |
Spokane County |
| Catharine Blaine K - 8 School |
King County |
| Cedar Crest Academy |
King County |
| Cedar Park Christian School - Bellevue Campus |
King County |
| Cedar Park Christian School - Bothell Campus - Elementary School |
King County |
| Cedar River Montessori School |
King County |
| Cedar Valley Community School |
Snohomish County |
| Cedarbrook Seventh - Day Adventist Christian School |
Jefferson County |
| Centerville School |
Klickitat County |
| Central Elementary School |
Snohomish County |
| Central Valley Kindergarten Center |
Spokane County |
| Charles Wright Academy |
Pierce County |
| Chautauqua Elementary School |
King County |
| Chelan County Juvenile Detention Center Alternative School |
Chelan County |
| Chelan Valley Independent School |
Chelan County |
| Chief Leschi School |
Pierce County |
| Children First |
Spokane County |
| Children's and Academy Schools |
King County |
| Children's First Montessori |
Kitsap County |
| Children's Garden Montessori School of Poulsbo |
Kitsap County |
| Childrens Gate Montessori School |
Chelan County |
| Childrens House Montessori School |
Spokane County |
| Children's Institute for Learning Differences |
King County |
| Children's Therapy Center |
King County |
| Children's Village Day Care Center Burton |
Clark County |
| Choice Alternative School |
Mason County |
| Christ Beginnings Child Center |
Spokane County |
| Christ the King Lutheran School |
Kitsap County |
| Christ the King School |
Benton County |
| Christ the Teacher Catholic School |
Yakima County |
| Christian Faith School |
King County |
| Christian Heritage School |
Lincoln County |
| Christian Life School |
Thurston County |
| Christian Worship Center Academy |
Yakima County |
| Chrysalis High School |
King County |
| Chrysalis School South Campus |
King County |
| Clallam Bay School |
Clallam County |
| Cle Elum Alternative School |
Kittitas County |
| Clearview Montessori School |
Snohomish County |
| Clover Valley Home Connection School |
Island County |
| Colton School |
Whitman County |
| Columbia Basin Secondary School |
Grant County |
| Columbia Crest Elementary School |
Pierce County |
| Columbia High and Elementary School |
Stevens County |
| Columbia River Christian Academy |
Stevens County |
| Columbia Virtual Academy |
Snohomish County |
| Columbia Virtual Academy - Colville |
Stevens County |
| Colville Valley Junior Academy |
Stevens County |
| Continuous Curriculum School |
Spokane County |
| Contractual School |
King County |
| Conway School |
Skagit County |
| Cornerstone Christian Academy |
Spokane County |
| Cornerstone Christian School |
Snohomish County |
| Cornerstone Christian School |
Whatcom County |
| Cornerstone Christian School |
Thurston County |
| Cornerstone Montessori School |
Spokane County |
