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Best Oklahoma Private Schools Belonging to Membership Associations (2026)

For the 2026 school year, there are 153 private schools belonging to membership associations in Oklahoma.
The most popular school membership associations are Association of Christian Schools International (ACSI) (23% of schools), Other school association(s) (22% of schools) and National Catholic Educational Association (NCEA) (20% of schools).

Top-Ranked Oklahoma Private Schools by Membership Association (2026)

Membership Association
# Schools
# Students
% Minority
AdvancED, Southern Association of Colleges and Schools, Council on Accreditation and School Improvement
1
320
20%
Accelerated Christian Education (ACE) or (School of Tomorrow)
8
509
29%
American Association of Christian Schools (AACS)
2
130
27%
American Montessori Society (AMS)
5
496
19%
Association of Christian Schools International (ACSI)
35
8,718
15%
Association of Christian Teachers and Schools (ACTS)
7
2,719
28%
Association of Classical and Christian Schools (ACCS)
4
1,265
18%
Bilingual School Association
1
91
70%
Christian Schools International (CSI)
3
481
8%
Cognia
10
5,514
30%
General Conference of SDA Church
1
12
100%
General Conference of the Seventh Day Adventist Church (GCSDAC)
4
145
59%
Independent Schools Association of the South West (ISAS)
5
4,250
21%
Institute for Independent Education
2
115
65%
International Montessori Council (IMC)
1
67
14%
Islamic School League of America (ISLA)
1
240
66%
Jesuit Secondary Education Association (JSEA)
1
160
90%
Middle States Association of Colleges and Secondary Schools
1
940
11%
National Association for the Education of Young Children
10
1,443
21%
National Association of College Admissions Counselors
1
1,032
15%
National Association of Episcopal Schools (NAES)
3
1,413
38%
National Association of Independent Schools (NAIS)
6
3,369
27%
National Association of Laboratory Schools
2
297
23%
National Association of Private Schools
1
30
78%
National Association of Secondary School Principals
1
213
12%
National Catholic Education Association
1
140
97%
National Catholic Educational Association (NCEA)
30
8,119
33%
National Christian School Association (NCSA)
2
548
29%
National Coalition of Girls
1
116
35%
National Council for Private School Accreditation
2
1,007
11%
National Honor Society (NHS)
1
213
12%
National Independent Private Schools Association
3
100
52%
National Lutheran Schools Accreditation
3
321
20%
Oral Roberts University Educational Fellowship (ORUEF)
10
2,600
35%
Other associations(s) for exceptional children
4
328
67%
Other religious school association(s)
17
4,187
23%
Other school association(s)
33
7,631
27%
Other special emphasis association(s)
5
1,800
15%
Solomon Schechter Day Schools (SSDS)
2
635
23%
Southern Association of Independent Schools
1
810
20%
State or regional independent school association
7
3,442
20%

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