#1 Largest Private Schools in Washington County, OR
Jesuit High School
Independent Catholic school · Grades 9–12
1,279 students
Portland, OR
AOverall grade1,279 students13 students per teacher
2026 lists
Largest Private Schools in Washington County, OR
The private schools in Washington County, OR with the most students. Top 34 of 34 schools.
#2 Largest Private Schools in Washington County, OR
Valley Catholic High School
Independent Catholic school · Grades K–12
1,006 students
Beaverton, OR
A+Overall grade1,006 students11 students per teacher
#3 Largest Private Schools in Washington County, OR
Catlin Gabel School
Independent school · Grades Pre-K–12
767 students
Portland, OR
B+Overall grade767 students33 students per teacher
#4 Largest Private Schools in Washington County, OR
Catlin Gabel
Independent school · Grades Pre-K–12
763 students
Portland, OR
A+Overall grade763 students8 students per teacher
#5 Largest Private Schools in Washington County, OR
Horizon Christian School
Christian school (nondenominational) · Grades Pre-K–12
644 students
Tualatin, OR
B-Overall grade644 students17 students per teacher
#6 Largest Private Schools in Washington County, OR
Horizon Christian Elememtary/Middle School
Christian school (nondenominational) · Grades K–12
629 students
Tualatin, OR
B-Overall grade629 students16 students per teacher
#7 Largest Private Schools in Washington County, OR
St. Pius X School
Diocesan school · Grades K–8
513 students
Portland, OR
A+Overall grade513 students8 students per teacher
#8 Largest Private Schools in Washington County, OR
Faith Bible Christian School
Christian school (nondenominational) · Grades Pre-K–12
479 students
Hillsboro, OR
B+Overall grade479 students12 students per teacher
#9 Largest Private Schools in Washington County, OR
French International School of Oregon
Independent school · Grades Pre-K–8
451 students
Portland, OR
AOverall grade451 students7 students per teacher
#10 Largest Private Schools in Washington County, OR
Valley Catholic Elementary School
Independent Catholic school · Grades K–5
340 students
Beaverton, OR
BOverall grade340 students17 students per teacher
#11 Largest Private Schools in Washington County, OR
Southwest Christian School
Christian school (nondenominational) · Grades Pre-K–12
330 students
Beaverton, OR
B-Overall grade330 students16 students per teacher
#12 Largest Private Schools in Washington County, OR
Valor Christian School International
Independent school · Grades Pre-K–12
294 students
Beaverton, OR
BOverall grade294 students12 students per teacher
#13 Largest Private Schools in Washington County, OR
St. Cecilia School
Parish school · Grades Pre-K–8
283 students
Beaverton, OR
BOverall grade283 students19 students per teacher
#14 Largest Private Schools in Washington County, OR
Holy Trinity Catholic School
Diocesan school · Grades Pre-K–8
258 students
Beaverton, OR
B+Overall grade258 students15 students per teacher
#15 Largest Private Schools in Washington County, OR
Life Christian School
Assembly of God school · Grades Pre-K–12
236 students
Aloha, OR
BOverall grade236 students17 students per teacher
#16 Largest Private Schools in Washington County, OR
Islamic School of Met/Oregon Islamic Academy
Islamic school · Grades Pre-K–12
226 students
Tigard, OR
A+Overall grade226 students9 students per teacher
#17 Largest Private Schools in Washington County, OR
German International School
Independent school · Grades Pre-K–6
209 students
Beaverton, OR
A+Overall grade209 students6 students per teacher
#18 Largest Private Schools in Washington County, OR
Visitation Catholic School
Parish school · Grades Pre-K–8
196 students
Forest Grove, OR
B+Overall grade196 students15 students per teacher
#19 Largest Private Schools in Washington County, OR
St. Francis School
Diocesan school · Grades Pre-K–8
170 students
Sherwood, OR
B+Overall grade170 students13 students per teacher
#20 Largest Private Schools in Washington County, OR
Forest Hills Lutheran Christian School
Diocesan school · Grades K–8
167 students
Cornelius, OR
B+Overall grade167 students13 students per teacher
#21 Largest Private Schools in Washington County, OR
Edison High School
Alternative school · Grades 9–12
135 students
Portland, OR
A-Overall grade135 students7 students per teacher
#22 Largest Private Schools in Washington County, OR
Westgate Christian School
Baptist school · Grades Pre-K–12
126 students
Tigard, OR
A+Overall grade126 students11 students per teacher
#23 Largest Private Schools in Washington County, OR
St. Francis of Assisi School
Diocesan school · Grades Pre-K–8
120 students
Banks, OR
B-Overall grade120 students19 students per teacher
#24 Largest Private Schools in Washington County, OR
Swallowtail School
Independent school · Grades Pre-K–8
118 students
Cornelius, OR
AOverall grade118 students7 students per teacher
From official public records, updated October 2026.