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Best Connecticut Private Schools Belonging to Membership Associations (2025-26)

For the 2025-26 school year, there are 304 private schools belonging to membership associations in Connecticut.
The most popular school membership associations are National Association of Independent Schools (NAIS) (26% of schools), National Catholic Educational Association (NCEA) (24% of schools) and Other school association(s) (18% of schools).

Top-Ranked Connecticut Private Schools by Membership Association (2025-26)

Membership Association
# Schools
# Students
% Minority
Accelerated Christian Education (ACE) or (School of Tomorrow)
3
275
17%
American Association of Christian Schools (AACS)
9
1,083
27%
American Montessori Society (AMS)
18
1,966
31%
Association for Experiential Education (AEE)
1
14
20%
Association Montessori International (AMI)
5
470
26%
Association Montessori Internationale (AMI)
3
472
33%
Association of Christian Schools International (ACSI)
15
1,312
40%
Association of Christian Teachers and Schools (ACTS)
1
59
91%
Association of Classical and Christian Schools (ACCS)
1
24
-
Association of Independent Schools in New England (AISNE)
1
166
17%
Association of Waldorf Schools of North America
2
159
11%
Cognia
2
14
-
Educational Records Bureau
1
210
23%
European Council for International Schools
1
39
25%
Evangelical Lutheran Education Association (ELEA)
1
105
28%
Friends Council on Education (FCE)
1
80
-
General Conference of the Seventh Day Adventist Church (GCSDAC)
4
163
98%
Institute for Independent Education
4
2,163
34%
International Baccalaureate (IB) World School
2
715
22%
International Boys Schools Coalition
2
511
12%
International Coalition of Girls Schools
1
226
31%
Jesuit Secondary Education Association (JSEA)
1
757
23%
Mercy Secondary Education Association (MSEA)
1
-
-
Middle States Association of Colleges and Secondary Schools
1
-
-
MSA-CESS Middle States Association Commissions on Elementary and Secondary Schools
2
14
-
National Association for the Education of Young Children
44
4,886
37%
National Association of College Admissions Counselors
1
192
50%
National Association of Episcopal Schools (NAES)
4
554
31%
National Association of Independent Schools (NAIS)
79
26,121
26%
National Association of Private Catholic and Independent Schools (NAPCIS)
3
413
60%
National Association of Private Schools
1
232
6%
National Association of Private Special Education Centers
16
1,231
48%
National Catholic Education Association
2
171
12%
National Catholic Educational Association (NCEA)
72
18,396
35%
National Coalition of Girls
4
1,098
76%
National Independent Private Schools Association
3
914
24%
National Lutheran Schools Accreditation
1
61
50%
National Middle School Association
3
828
12%
National Society of Hebrew Day Schools (NSHDS)
3
896
-
New England Association of Schools and Colleges
54
14,188
34%
New York State Association of Independent Schools (NYSAIS)
1
115
-
Other associations(s) for exceptional children
12
1,106
45%
Other Montessori association(s)
8
485
42%
Other religious school association(s)
9
1,361
19%
Other school association(s)
55
10,796
31%
Other special emphasis association(s)
17
1,100
40%
Progressive Education Network
1
240
34%
Solomon Schechter Day Schools (SSDS)
2
196
4%
Southern Baptist Association of Christian Schools (SBACS)
1
85
30%
State or regional independent school association
33
9,426
24%
The Association of Boarding Schools (TABS)
21
6,745
30%
Western Association of Schools and Colleges (WASC)
1
-
-
Xaverian Brothers School Sponsorship
1
410
10%

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