#1 Fastest-Growing Private Schools in Seattle, WA
Hamlin Robinson School
Special education school · Grades 1–8
Enrollment up 158% in about a decade
Seattle, WA
B+Overall grade389 students7 students per teacher
2026 lists
Fastest-Growing Private Schools in Seattle, WA
Private schools in Seattle, WA whose enrollment has grown the most over the past decade. Top 16 of 16 schools.
#2 Fastest-Growing Private Schools in Seattle, WA
Perkins School
Independent school · Grades K–5
Enrollment up 111% in about a decade
Seattle, WA
A+Overall grade129 students8 students per teacher
#3 Fastest-Growing Private Schools in Seattle, WA
Kapka Cooperative School
Independent school · Grades K–5
Enrollment up 83% in about a decade
Seattle, WA
AOverall grade66 students8 students per teacher
#4 Fastest-Growing Private Schools in Seattle, WA
Seattle Academy
Independent school · Grades 6–12
Enrollment up 80% in about a decade
Seattle, WA
A+Overall grade1,170 students8 students per teacher
#5 Fastest-Growing Private Schools in Seattle, WA
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
#6 Fastest-Growing Private Schools in Seattle, WA
Westside School
Independent school · Grades Pre-K–8
Enrollment up 53% in about a decade
Seattle, WA
BOverall grade340 students12 students per teacher
#7 Fastest-Growing Private Schools in Seattle, WA
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
#8 Fastest-Growing Private Schools in Seattle, WA
University Prep
Independent school · Grades 6–12
Enrollment up 30% in about a decade
Seattle, WA
A+Overall grade662 students8 students per teacher
#9 Fastest-Growing Private Schools in Seattle, WA
The Bush School
Independent school · Grades K–12
Enrollment up 25% in about a decade
Seattle, WA
A+Overall grade715 students9 students per teacher
#10 Fastest-Growing Private Schools in Seattle, WA
Seattle Girls School
Independent school · Grades 5–8
Enrollment up 22% in about a decade
Seattle, WA
A-Overall gradeAll girls129 students10 students per teacher
#11 Fastest-Growing Private Schools in Seattle, WA
Concordia Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–7
Enrollment up 21% in about a decade
Seattle, WA
A+Overall grade58 students7 students per teacher
#12 Fastest-Growing Private Schools in Seattle, WA
Explorer West Middle School
Independent school · Grades 6–8
Enrollment up 20% in about a decade
Seattle, WA
A-Overall grade106 students9 students per teacher
#13 Fastest-Growing Private Schools in Seattle, WA
Epiphany School
Independent school · Grades Pre-K–5
Enrollment up 13% in about a decade
Seattle, WA
A+Overall grade232 students7 students per teacher
#14 Fastest-Growing Private Schools in Seattle, WA
The Lake and Park School
Independent school · Grades Pre-K–5
Enrollment up 12% in about a decade
Seattle, WA
B+Overall grade64 students8 students per teacher
#15 Fastest-Growing Private Schools in Seattle, WA
O'Dea High School
Diocesan school · Grades 9–12
Enrollment up 10% in about a decade
Seattle, WA
BOverall gradeAll boys461 students14 students per teacher
#16 Fastest-Growing Private Schools in Seattle, WA
Academy for Precision Learning
Special education school · Grades K–12
Enrollment up 10% in about a decade
Seattle, WA
AOverall grade66 students4 students per teacher
From official public records, updated October 2026.