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Best Oregon Private Schools Belonging to Membership Associations (2026-27)

For the 2026-27 school year, there are 291 private schools belonging to membership associations in Oregon.
The most popular school membership associations are Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) (20% of schools), Association of Christian Schools International (ACSI) (19% of schools) and National Catholic Educational Association (NCEA) (18% of schools).

Quick Facts (2026-27)

  • # Private Schools: 291

Quick Facts (2026-27)

  • # Private Schools: 291

Top Ranked Oregon Private Schools by Membership Association (2026-27)

Membership Association
# Schools
# Students
% Minority
Accelerated Christian Education (School of Tomorrow) (ACE)
5
258
8%
Accreditation International
1
52
15%
American Association of Christian Schools (AACS)
3
365
36%
American Montessori Society (AMS)
8
689
29%
Association Montessori Internationale (AMI)
8
1,234
25%
Association of Christian Schools International (ACSI)
56
11,575
17%
Association of Christian Teachers and Schools (ACTS)
4
383
17%
Association of Classical Christian Schools (ACCS)
5
831
30%
Association of Waldorf Schools of North America (AWSNA)
9
1,403
14%
Christian Schools International (CSI)
3
298
17%
Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia)
57
14,920
23%
Council of Bilingual Education (PVSR legacy category)
1
106
-
Educational Collaborative for International Schools (ECIS)
2
124
27%
Evangelical Lutheran Education Association (ELEA)
4
193
11%
General Conference of Seventh-day Adventists (Education) (GCSDAC)
24
1,606
23%
International Baccalaureate World School (IB)
4
1,576
32%
Islamic School League of America (ISLA)
1
74
68%
Jesuit Schools Network (formerly JSEA) (JSN)
1
1,301
45%
Middle States Association Commissions on Elementary and Secondary Schools (MSA-CESS)
2
502
30%
National Association for the Education of Young Children (NAEYC)
26
2,326
31%
National Association of Episcopal Schools (NAES)
1
861
47%
National Association of Independent Schools (NAIS)
17
5,502
33%
National Association of Private Schools (NAPS)
2
312
43%
National Association of Private Special Education Centers (NAPSEC)
1
49
23%
National Catholic Educational Association (NCEA)
51
13,061
28%
National Council for Private School Accreditation (NCPSA)
1
216
26%
National Independent Private School Association (NIPSA)
8
1,022
21%
National Lutheran Schools Accreditation (NLSA)
4
911
14%
National Society of Hebrew Day Schools (NSHDS)
1
84
-
Northwest Association of Independent Schools (NWAIS)
7
2,455
29%
Other associations(s) for exceptional children
3
330
29%
Other Montessori association(s)
18
1,030
23%
Other religious school association(s)
14
2,292
28%
Other school association(s)
49
7,284
34%
Other special emphasis association(s)
10
1,727
33%
Prizmah: Center for Jewish Day Schools (absorbed SSDSA) (Prizmah)
1
84
-
Progressive Education Network (PEN)
1
111
17%
Society for Classical Learning (SCL)
1
286
33%
Southern Association of Colleges and Schools Commission on Colleges (SACSCOC)
3
346
48%
State or regional independent school association
13
2,743
33%
The Association of Boarding Schools (TABS)
2
271
37%
Waldorf Early Childhood Association of North America (WECAN)
4
654
14%
Western Association of Schools and Colleges (Accrediting Commission for Schools) (ACS WASC)
3
1,026
24%
Wisconsin Evangelical Lutheran Synod School Accreditation (WELSSA)
1
96
30%

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