#1 Most Diverse Private Schools in King County, WA
St. Bernadette School
Parish school · Grades Pre-K–8
Largest group: 23% of students
Burien, WA
AOverall grade168 students14 students per teacher
2026 lists
Most Diverse Private Schools in King County, WA
Private schools in King County, WA with the most varied mix of students. Top 50 of 137 schools.
#2 Most Diverse Private Schools in King County, WA
St. Vincent De Paul School
Parish school · Grades Pre-K–8
Largest group: 26% of students
Federal Way, WA
A+Overall grade232 students14 students per teacher
#3 Most Diverse Private Schools in King County, WA
Oneworld Now
Alternative school · Grades 8–12
Largest group: 27% of students
Seattle, WA
B-Overall grade203 students
#4 Most Diverse Private Schools in King County, WA
Holy Family Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 31% of students
Auburn, WA
A+Overall grade173 students12 students per teacher
#5 Most Diverse Private Schools in King County, WA
Woodinville Montessori School
Montessori school · Grades Pre-K–12
Largest group: 32% of students
Bothell, WA
A+Overall grade312 students7 students per teacher
#6 Most Diverse Private Schools in King County, WA
St. George Parish School
Diocesan school · Grades Pre-K–8
Largest group: 33% of students
Seattle, WA
AOverall grade240 students16 students per teacher
#7 Most Diverse Private Schools in King County, WA
Renton Prep Christian School
Lutheran (Missouri Synod) school · Grades Pre-K–10
Largest group: 33% of students
Renton, WA
B+Overall grade220 students13 students per teacher
#8 Most Diverse Private Schools in King County, WA
Willows Preparatory School
Alternative school · Grades 5–12
Largest group: 35% of students
Redmond, WA
B+Overall grade271 students9 students per teacher
#9 Most Diverse Private Schools in King County, WA
St. Philomena School
Parish school · Grades Pre-K–8
Largest group: 35% of students
Des Moines, WA
B+Overall grade261 students18 students per teacher
#10 Most Diverse Private Schools in King County, WA
Forest Ridge School of the Sacred Heart
Independent Catholic school · Grades 5–12
Largest group: 35% of students
Bellevue, WA
A+Overall gradeAll girls245 students7 students per teacher
#11 Most Diverse Private Schools in King County, WA
Renton Prep Christian School
Lutheran (Missouri Synod) school · Grades Pre-K–10
Largest group: 35% of students
Renton, WA
A+Overall grade165 students8 students per teacher
#12 Most Diverse Private Schools in King County, WA
St. Anthony Elementary School
Diocesan school · Grades Pre-K–8
Largest group: 36% of students
Renton, WA
B+Overall grade350 students18 students per teacher
#13 Most Diverse Private Schools in King County, WA
Woodinville Montessori School
Montessori school · Grades Pre-K–12
Largest group: 36% of students
Bothell, WA
AOverall grade312 students8 students per teacher
#14 Most Diverse Private Schools in King County, WA
St. Madeleine Sophie Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 36% of students
Bellevue, WA
A+Overall grade144 students9 students per teacher
#15 Most Diverse Private Schools in King County, WA
Dartmoor School
Alternative school · Grades 3–12
Largest group: 38% of students
Issaquah, WA
AOverall grade78 students5 students per teacher
#16 Most Diverse Private Schools in King County, WA
Holy Trinity Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Largest group: 41% of students
Des Moines, WA
BOverall grade186 students17 students per teacher
#17 Most Diverse Private Schools in King County, WA
Glendale Lutheran School
Lutheran (ELCA) school · Grades Pre-K–8
Largest group: 41% of students
Burien, WA
AOverall grade63 students11 students per teacher
#18 Most Diverse Private Schools in King County, WA
Eastside Montessori Education Family
Montessori school · Grades Pre-K–5
Largest group: 41% of students
Sammamish, WA
A+Overall grade54 students2 students per teacher
#19 Most Diverse Private Schools in King County, WA
The Little School
Independent school · Grades Pre-K–5
Largest group: 42% of students
Bellevue, WA
A+Overall grade165 students9 students per teacher
#20 Most Diverse Private Schools in King County, WA
Northwest Montessori School
Montessori school · Grades Pre-K–6
Largest group: 42% of students
Seattle, WA
B+Overall grade55 students14 students per teacher
#21 Most Diverse Private Schools in King County, WA
Seattle Amistad School
Independent school · Grades Pre-K–8
Largest group: 43% of students
Seattle, WA
B+Overall grade96 students14 students per teacher
#22 Most Diverse Private Schools in King County, WA
The Bush School
Independent school · Grades K–12
Largest group: 44% of students
Seattle, WA
A+Overall grade715 students9 students per teacher
#23 Most Diverse Private Schools in King County, WA
Medina Academy
Islamic school · Grades Pre-K–8
Largest group: 44% of students
Bellevue, WA
A+Overall grade229 students11 students per teacher
#24 Most Diverse Private Schools in King County, WA
St. Matthew School
Diocesan school · Grades Pre-K–8
Largest group: 44% of students
Seattle, WA
A+Overall grade105 students13 students per teacher
From official public records, updated October 2026.