#25 Largest Private Schools in Portland, OR
St. Thomas More School
Diocesan school · Grades K–8
193 students
Portland, OR
AOverall grade193 students12 students per teacher
2026 lists
Largest Private Schools in Portland, OR
The private schools in Portland, OR with the most students. Top 50 of 56 schools.
From official public records, updated October 2026.