#1 Fastest-Growing Private Schools in Portland, OR
Rosemary Anderson High School/Portland Oic
Alternative school · Grades 6–12
Enrollment up 145% in about a decade
Portland, OR
B-Overall grade326 students14 students per teacher
2026 lists
Fastest-Growing Private Schools in Portland, OR
Private schools in Portland, OR whose enrollment has grown the most over the past decade. Top 13 of 13 schools.
#2 Fastest-Growing Private Schools in Portland, OR
L'etoile French Immersion School
Independent school · Grades K–5
Enrollment up 121% in about a decade
Portland, OR
B+Overall grade84 students9 students per teacher
#3 Fastest-Growing Private Schools in Portland, OR
Portland Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
Enrollment up 102% in about a decade
Portland, OR
AOverall grade628 students14 students per teacher
#4 Fastest-Growing Private Schools in Portland, OR
Slavic Christian Academy
Christian school (nondenominational) · Grades K–8
Enrollment up 97% in about a decade
Portland, OR
B+Overall grade73 students8 students per teacher
#5 Fastest-Growing Private Schools in Portland, OR
West Hills Montessori School-Vermont
Montessori school · Grades Pre-K–6
Enrollment up 75% in about a decade
Portland, OR
A+Overall grade103 students5 students per teacher
#6 Fastest-Growing Private Schools in Portland, OR
Edison High School
Alternative school · Grades 9–12
Enrollment up 61% in about a decade
Portland, OR
A-Overall grade135 students7 students per teacher
#7 Fastest-Growing Private Schools in Portland, OR
St. Pius X School
Diocesan school · Grades K–8
Enrollment up 51% in about a decade
Portland, OR
A+Overall grade513 students8 students per teacher
#8 Fastest-Growing Private Schools in Portland, OR
Bridges Middle School
Special education school · Grades 4–8
Enrollment up 50% in about a decade
Portland, OR
B+Overall grade60 students9 students per teacher
#9 Fastest-Growing Private Schools in Portland, OR
Columbia Christian Schools
Church of Christ school · Grades Pre-K–12
Enrollment up 42% in about a decade
Portland, OR
B+Overall grade322 students13 students per teacher
#10 Fastest-Growing Private Schools in Portland, OR
Village Free School
Alternative school · Kindergarten only
Enrollment up 38% in about a decade
Portland, OR
B+Overall grade62 students9 students per teacher
#11 Fastest-Growing Private Schools in Portland, OR
St. Andrew Nativity School
Independent Catholic school · Grades 6–8
Enrollment up 29% in about a decade
Portland, OR
A+Overall grade81 students12 students per teacher
#12 Fastest-Growing Private Schools in Portland, OR
The Portland Montessori School
Montessori school · Grades Pre-K–4
Enrollment up 25% in about a decade
Portland, OR
B+Overall grade55 students9 students per teacher
#13 Fastest-Growing Private Schools in Portland, OR
Catlin Gabel School
Independent school · Grades Pre-K–12
Enrollment up 10% in about a decade
Portland, OR
B+Overall grade767 students33 students per teacher
From official public records, updated October 2026.