Private School Review - Established 2003
Abiqua School
Bridges Middle School Top 4 · Lowest Acceptance Rate (OR)
The Delphian School Top 3 · Largest Endowment (OR)

Oregon Private Schools Belonging to National Association of Independent Schools (NAIS)

For the 2026-27 school year, there are 17 private schools belonging to National Association of Independent Schools (NAIS) serving 5,507 students in Oregon. You can also find more schools membership associations in Oregon.
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oregon include Oregon Episcopal School, The Delphian School, and Cascades Academy.
The average tuition cost is $21,622, which is higher than the Oregon private school average tuition cost of $10,558.
29% of private schools belonging to National Association of Independent Schools (NAIS) in Oregon are religiously affiliated (most commonly Catholic and Episcopal).

Quick Facts (26-27)

  • # Private Schools: 17

Quick Facts (26-27)

  • # Private Schools: 17

Top Ranked Private Schools Belonging to National Association of Independent Schools (NAIS) in Oregon (2026-27)

Abiqua School Photo
Abiqua School
Gr: NS-8 | 226 students
Avg. class size: 20 students
Sports: 6 | Extracurriculars: 6
6974 Bates Rd SE
Salem, OR 97306
(503) 399-9020
(5)
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Bridges Middle School Photo
Bridges Middle School
Gr: 5-8 | 64 students
Avg. class size: 12 students
Special Education School
2510 SW 1st Avenue
Portland, OR 97201
(503) 688-2922
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Catlin Gabel School Photo
Catlin Gabel School
Gr: PK-12 | 788 students
Avg. class size: 15 students
Sports: 8 | Extracurriculars: 35
8825 SW Barnes Road
Portland, OR 97225
(503) 297-1894
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The Delphian School Photo
The Delphian School
Gr: PK-12 | 234 students
Avg. class size: 13 students
Sports: 6 | Extracurriculars: 36
Alternative School
20950 South West Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
(6)
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International School Of Portland Photo
International School Of Portland
Gr: PK-5 | 346 students
Avg. class size: 13 students
Sports: 3 | Extracurriculars: 4
Specialized Curriculum
2305 S Water Avenue
Portland, OR 97201
(503) 226-2496
(17)
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Oregon Episcopal School Photo
Oregon Episcopal School
Gr: PK-12 | 861 students
Avg. class size: 16 students
Sports: 10 | Extracurriculars: 59
Episcopal
6300 SW Nicol Road
Portland, OR 97223
(503) 768-3115
(5)
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Cascades Academy Photo
Cascades Academy
Gr: PK-12 | 256 students
Avg. class size: 18 students
Sports: 8 | Extracurriculars: 11
19860 Tumalo Reservoir Road
Bend, OR 97703
(541) 382-0699
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Franciscan Montessori Earth School Photo
Franciscan Montessori Earth School
Gr: Inquire with school | 293 students
Avg. class size: 25 students
Sports: 6 | Extracurriculars: 12
Montessori School (Catholic)
14750 Se Clinton Street
Portland, OR 97236
(503) 760-8220
(1)
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French International School of Oregon Photo
French International School of Oregon
Gr: NS-8 | 570 students
Avg. class size: 15 students
Sports: 5 | Extracurriculars: 17
Specialized Curriculum
8500 NW Johnson Street
Portland, OR 97229
(503) 292-7776
(9)
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Map of Holy Redeemer Catholic School
Holy Redeemer Catholic School
Gr: PK-8 | 291 students
Catholic
127 N Rosa Parks Way
Portland, OR 97217
(503) 283-5197
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Map of Portland Adventist Elementary School
Portland Adventist Elementary School
Gr: PK-8 | 330 students
Avg. class size: 18 students
Sports: 5 | Extracurriculars: 6
Seventh Day Adventist
3990 Nw 1st Street
Gresham, OR 97030
(503) 665-4102
(3)
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St. Mary's Of Medford Photo
St. Mary's Of Medford
Gr: 5-12 | 529 students
Avg. class size: 18 students
Sports: 13 | Extracurriculars: 16
Catholic
816 Black Oak Drive
Medford, OR 97504
(541) 773-7877
(1)
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Ashbrook Independent School Photo
Ashbrook Independent School
Gr: NS-8 | 176 students
Avg. class size: 17 students
Sports: 1 | Extracurriculars: 19
4045 SW Research Way
Corvallis, OR 97333
(541) 766-8313
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Map of Mt. Scott Park Center For Learning
Mt. Scott Park Center For Learning
Gr: 9-12 | 131 students
Alternative School
6148 Se Holgate Blvd
Portland, OR 97206
(503) 771-8880
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Oak Hill School Photo
Oak Hill School
Gr: PK-8 | 193 students
Avg. class size: 15 students
Sports: 2 | Extracurriculars: 3
86397 Eldon Schafer Dr
Eugene, OR 97405
(541) 744-0954
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The Portland Montessori School Photo
The Portland Montessori School
Gr: NS-6 | 151 students
Avg. class size: 22 students
Montessori School
205 NE 50th Ave
Portland, OR 97213
(503) 688-2992
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Map of West Hills Montessori School-lake Oswego
West Hills Montessori School-lake Oswego
Gr: PK-K | 68 students
Montessori School
4515 Parkview Dr
Lake Oswego, OR 97035
(503) 351-6444
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Frequently Asked Questions

What are the top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oregon?
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oregon include Oregon Episcopal School, The Delphian School, and Cascades Academy.
How many private schools belonging to National Association of Independent Schools (NAIS) are located in Oregon?
17 private schools belonging to National Association of Independent Schools (NAIS) are located in Oregon.
How much do private schools belonging to National Association of Independent Schools (NAIS) cost in Oregon?
The average tuition cost is $21,622, which is higher than the Oregon private school average tuition cost of $10,558.
How diverse are private schools belonging to National Association of Independent Schools (NAIS) in Oregon?
Oregon private schools belonging to National Association of Independent Schools (NAIS) are approximately 33% minority students, which is higher than the Oregon private school average of 26%.
What percentage of private schools belonging to National Association of Independent Schools (NAIS) are religiously affiliated in Oregon?
29% of private schools belonging to National Association of Independent Schools (NAIS) in Oregon are religiously affiliated (most commonly Catholic and Episcopal).
17
Private Schools
5,507
Students
$21,622
Avg. Tuition
33%
Students of Color
9:1
Student-Teacher Ratio

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