#1 Most Diverse Private Schools in Multnomah County, OR
Community Transitional School
Independent school · Grades Pre-K–8
Largest group: 28% of students
Portland, OR
B+Overall grade76 students
2026 lists
Most Diverse Private Schools in Multnomah County, OR
Private schools in Multnomah County, OR with the most varied mix of students. Top 43 of 43 schools.
#2 Most Diverse Private Schools in Multnomah County, OR
Rosemary Anderson High School/Portland Oic
Alternative school · Grades 6–12
Largest group: 32% of students
Portland, OR
B-Overall grade326 students14 students per teacher
#3 Most Diverse Private Schools in Multnomah County, OR
St. Therese Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 33% of students
Portland, OR
B+Overall grade195 students18 students per teacher
#4 Most Diverse Private Schools in Multnomah County, OR
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades K–8
Largest group: 38% of students
Portland, OR
B+Overall grade50 students
#5 Most Diverse Private Schools in Multnomah County, OR
Holy Redeemer Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 40% of students
Portland, OR
A-Overall grade236 students16 students per teacher
#6 Most Diverse Private Schools in Multnomah County, OR
De La Salle North Catholic High School
Independent Catholic school · Grades 9–12
Largest group: 43% of students
Portland, OR
AOverall grade220 students12 students per teacher
#7 Most Diverse Private Schools in Multnomah County, OR
International School of Portland
Independent school · Grades Pre-K–5
Largest group: 45% of students
Portland, OR
A+Overall grade290 students8 students per teacher
#8 Most Diverse Private Schools in Multnomah County, OR
Portland Adventist Academy
Seventh-day Adventist school · Grades 9–12
Largest group: 46% of students
Portland, OR
B+Overall grade193 students13 students per teacher
#9 Most Diverse Private Schools in Multnomah County, OR
Portland Adventist Elementary School
Seventh-day Adventist school · Grades Pre-K–8
Largest group: 49% of students
Gresham, OR
BOverall grade292 students17 students per teacher
#10 Most Diverse Private Schools in Multnomah County, OR
Holy Cross Catholic School
Parish school · Grades Pre-K–8
Largest group: 51% of students
Portland, OR
A+Overall grade215 students14 students per teacher
#11 Most Diverse Private Schools in Multnomah County, OR
Portland Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
Largest group: 55% of students
Portland, OR
AOverall grade628 students14 students per teacher
#12 Most Diverse Private Schools in Multnomah County, OR
Columbia Christian Schools
Church of Christ school · Grades Pre-K–12
Largest group: 55% of students
Portland, OR
B+Overall grade322 students13 students per teacher
#13 Most Diverse Private Schools in Multnomah County, OR
Portland Christian Elementary School
Christian school (nondenominational) · Grades Pre-K–5
Largest group: 55% of students
Portland, OR
B-Overall grade322 students17 students per teacher
#14 Most Diverse Private Schools in Multnomah County, OR
St. Ignatius School
Diocesan school · Grades Pre-K–8
Largest group: 61% of students
Portland, OR
AOverall grade196 students15 students per teacher
#15 Most Diverse Private Schools in Multnomah County, OR
St. Andrew Nativity School
Independent Catholic school · Grades 6–8
Largest group: 62% of students
Portland, OR
A+Overall grade81 students12 students per teacher
#16 Most Diverse Private Schools in Multnomah County, OR
Franciscan Montessori Earth School
Independent Catholic school · Grades Pre-K–8
Largest group: 64% of students
Portland, OR
B+Overall grade228 students16 students per teacher
#17 Most Diverse Private Schools in Multnomah County, OR
West Hills Montessori School-Vermont
Montessori school · Grades Pre-K–6
Largest group: 64% of students
Portland, OR
A+Overall grade103 students5 students per teacher
#18 Most Diverse Private Schools in Multnomah County, OR
Grace Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Largest group: 64% of students
Portland, OR
B+Overall grade83 students17 students per teacher
#19 Most Diverse Private Schools in Multnomah County, OR
Puddletown School
Montessori school · Grades Pre-K–8
Largest group: 64% of students
Portland, OR
B+Overall grade66 students9 students per teacher
#20 Most Diverse Private Schools in Multnomah County, OR
Central Catholic High School
Diocesan school · Grades 9–12
Largest group: 65% of students
Portland, OR
B+Overall grade865 students15 students per teacher
#21 Most Diverse Private Schools in Multnomah County, OR
St. Rose School
Parish school · Grades Pre-K–8
Largest group: 68% of students
Portland, OR
A+Overall grade194 students9 students per teacher
#22 Most Diverse Private Schools in Multnomah County, OR
Childpeace Montessori School
Montessori school · Grades Pre-K–8
Largest group: 68% of students
Portland, OR
A+Overall grade186 students8 students per teacher
#23 Most Diverse Private Schools in Multnomah County, OR
Class Academy
Independent school · Grades Pre-K–5
Largest group: 68% of students
Portland, OR
B+Overall grade120 students10 students per teacher
#24 Most Diverse Private Schools in Multnomah County, OR
Sunstone Montessori School
Montessori school · Grades Pre-K–6
Largest group: 68% of students
Portland, OR
B+Overall grade85 students12 students per teacher
From official public records, updated October 2026.