#25 Fastest-Growing Private Schools in Washington
Medina Academy
Islamic school · Grades Pre-K–8
Enrollment up 78% in about a decade
Bellevue, WA
A+Overall grade229 students11 students per teacher
2026 lists
Fastest-Growing Private Schools in Washington
Private schools in Washington whose enrollment has grown the most over the past decade. Top 50 of 120 schools.
#26 Fastest-Growing Private Schools in Washington
Agape Christian Academy
Christian school (nondenominational) · Grades Pre-K–2
Enrollment up 78% in about a decade
Camas, WA
A+Overall grade98 students7 students per teacher
#27 Fastest-Growing Private Schools in Washington
Island Christian Academy
Assembly of God school · Grades Pre-K–12
Enrollment up 74% in about a decade
Langley, WA
A+Overall grade157 students9 students per teacher
#28 Fastest-Growing Private Schools in Washington
Spokane Christian Academy
Christian school (nondenominational) · Grades K–9
Enrollment up 74% in about a decade
Spokane, WA
A+Overall grade94 students9 students per teacher
#29 Fastest-Growing Private Schools in Washington
Sunbeams Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–5
Enrollment up 74% in about a decade
Kent, WA
AOverall grade54 students13 students per teacher
#30 Fastest-Growing Private Schools in Washington
Heritage Christian Academy
Baptist school · Grades Pre-K–10
Enrollment up 73% in about a decade
Bothell, WA
A+Overall grade253 students8 students per teacher
#31 Fastest-Growing Private Schools in Washington
Cascade Christian Schools - Frederickson Elem.
Christian school (nondenominational) · Grades Pre-K–6
Enrollment up 71% in about a decade
Tacoma, WA
BOverall grade282 students17 students per teacher
#32 Fastest-Growing Private Schools in Washington
The River Academy
Christian school (nondenominational) · Grades Pre-K–12
Enrollment up 70% in about a decade
Wenatchee, WA
BOverall grade286 students12 students per teacher
#33 Fastest-Growing Private Schools in Washington
Spring Street International School
Independent school · Grades 6–12
Enrollment up 70% in about a decade
Friday Harbor, WA
AOverall grade117 students5 students per teacher
#34 Fastest-Growing Private Schools in Washington
Glendale Lutheran School
Lutheran (ELCA) school · Grades Pre-K–8
Enrollment up 70% in about a decade
Burien, WA
AOverall grade63 students11 students per teacher
#35 Fastest-Growing Private Schools in Washington
Harbor School
Independent school · Grades K–8
Enrollment up 67% in about a decade
Vashon, WA
B+Overall grade77 students8 students per teacher
#36 Fastest-Growing Private Schools in Washington
Olympic Christian School
Christian school (nondenominational) · Grades Pre-K–12
Enrollment up 66% in about a decade
Port Angeles, WA
B+Overall grade171 students12 students per teacher
#37 Fastest-Growing Private Schools in Washington
Crosspoint
Christian school (nondenominational) · Grades K–12
Enrollment up 61% in about a decade
Bremerton, WA
BOverall grade373 students11 students per teacher
#38 Fastest-Growing Private Schools in Washington
Ebenezer Christian School
Calvinist school · Grades Pre-K–8
Enrollment up 61% in about a decade
Lynden, WA
BOverall grade164 students14 students per teacher
#39 Fastest-Growing Private Schools in Washington
St. Therese Catholic Academy
Diocesan school · Grades K–8
Enrollment up 60% in about a decade
Seattle, WA
A+Overall grade198 students8 students per teacher
#40 Fastest-Growing Private Schools in Washington
Renton Christian School
Assembly of God school · Grades Pre-K–8
Enrollment up 58% in about a decade
Renton, WA
B+Overall grade690 students16 students per teacher
#41 Fastest-Growing Private Schools in Washington
Lighthouse Christian School
Christian school (nondenominational) · Grades K–8
Enrollment up 57% in about a decade
Gig Harbor, WA
A-Overall grade508 students14 students per teacher
#42 Fastest-Growing Private Schools in Washington
Three Tree Montessori School
Montessori school · Grades Pre-K–6
Enrollment up 55% in about a decade
Burien, WA
A-Overall grade73 students10 students per teacher
#43 Fastest-Growing Private Schools in Washington
Westside School
Independent school · Grades Pre-K–8
Enrollment up 53% in about a decade
Seattle, WA
BOverall grade340 students12 students per teacher
#44 Fastest-Growing Private Schools in Washington
Woodinville Montessori School
Montessori school · Grades Pre-K–12
Enrollment up 52% in about a decade
Bothell, WA
A+Overall grade312 students7 students per teacher
#45 Fastest-Growing Private Schools in Washington
Menachem Mendel Seattle Cheder Day School
Jewish day school · Grades Pre-K–8
Enrollment up 52% in about a decade
Seattle, WA
A-Overall grade88 students6 students per teacher
#46 Fastest-Growing Private Schools in Washington
Journey Christian School
Seventh-day Adventist school · Grades Pre-K–8
Enrollment up 50% in about a decade
Kelso, WA
AOverall grade60 students10 students per teacher
#47 Fastest-Growing Private Schools in Washington
St. Basil Academy of Classical Studies
Religious school · Grades K–8
Enrollment up 47% in about a decade
Walla Walla, WA
B+Overall grade50 students13 students per teacher
#48 Fastest-Growing Private Schools in Washington
Centralia Christian School
Christian school (nondenominational) · Grades Pre-K–10
Enrollment up 46% in about a decade
Centralia, WA
BOverall grade224 students12 students per teacher
From official public records, updated October 2026.