The Delphian School Photo - At The Delphian School, teachers don`t lecture in front of a blackboard while students frantically take notes. At our school, students learn at their own pace and study independently with a personalized program that is specifically designed to satisfy their specific needs and interests.

Top 3 Best Oregon Private High Schools Belonging to NWAIS (Northwest Association of Independent Schools) (2025)

For the 2025 school year, there are 3 private high schools belonging to NWAIS (Northwest Association of Independent Schools) serving 1,329 students in Oregon. You can also find more schools membership associations in Oregon.
The top ranked private high schools belonging to NWAIS (Northwest Association of Independent Schools) in Oregon include The Delphian School, Oregon Episcopal School, and Northwest Academy.
The average acceptance rate is 67%, which is lower than the Oregon private high school average acceptance rate of 84%.
33% of private high schools belonging to NWAIS (Northwest Association of Independent Schools) in Oregon are religiously affiliated (most commonly Episcopal).

Top Ranked Private High Schools Belonging to NWAIS (Northwest Association of Independent Schools) in Oregon (2025)

School
Location
Grades
Students
The Delphian School
The Delphian School Photo - At The Delphian School, teachers don`t lecture in front of a blackboard while students frantically take notes. At our school, students learn at their own pace and study independently with a personalized program that is specifically designed to satisfy their specific needs and interests.
Alternative School
(6)
20950 South West Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
Grades: K-12
| 229 students
Oregon Episcopal School
Oregon Episcopal School Photo - Our beautiful 59-acre campus provides the perfect setting for open minds to inquire, explore, and grow in order to succeed in an ever-changing global community.
(Episcopal)
(5)
6300 SW Nicol Road
Portland, OR 97223
(503) 768-3115
Grades: PK-12
| 866 students
Northwest Academy
Northwest Academy Photo
(3)
1130 SW Main Street
Portland, OR 97205
(503) 223-3367
Grades: 6-12
| 234 students

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