Private School Review - Established 2003
Westover School Top 8 · Highest Avg. ACT Score (CT)
The Williams School Top 11 · Highest Avg. ACT Score (CT)
Rectory School Top 21 · Largest Endowment (CT)

Best Connecticut Private Schools Belonging to National Association of Independent Schools (NAIS) (2026)

For the 2026 school year, there are 79 private schools belonging to National Association of Independent Schools (NAIS) serving 26,552 students in Connecticut. You can also find more schools membership associations in Connecticut.
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Connecticut include Choate Rosemary Hall, King School, and St. Joseph High School.
The average tuition cost is $50,757, which is higher than the Connecticut private school average tuition cost of $28,702.
24% of private schools belonging to National Association of Independent Schools (NAIS) in Connecticut are religiously affiliated (most commonly Catholic and Episcopal).

Quick Facts (2026)

  • # Private Schools: 79

Quick Facts (2026)

  • # Private Schools: 79

Top Ranked Private Schools Belonging to National Association of Independent Schools (NAIS) in Connecticut (2026)

Hamden Hall Country Day School Photo
Hamden Hall Country Day School
Gr: NS-12 | 650 students
Avg. class size: 12 students
Sports: 22 | Extracurriculars: 45
1108 Whitney Ave
Hamden, CT 06517
(203) 752-2610
(4)
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Immaculate High School Photo
Immaculate High School
Gr: 9-12 | 396 students
Avg. class size: 16 students
Sports: 17 | Extracurriculars: 24
Catholic
73 Southern Blvd
Danbury, CT 06810
(203) 744-1510
(12)
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King School Photo
King School
Gr: PK-12 | 718 students
Avg. class size: 12 students
Sports: 19 | Extracurriculars: 42
1450 Newfield Ave
Stamford, CT 06905
(203) 322-3496
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Kingswood Oxford School Photo
Kingswood Oxford School
Gr: 6-12 | 507 students
Avg. class size: 13 students
Sports: 18 | Extracurriculars: 30
170 Kingswood Road
West Hartford, CT 06119
(860) 727-5000
(1)
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New Canaan Country School Photo
New Canaan Country School
Gr: NS-9 | 555 students
Avg. class size: 16 students
Sports: 13 | Extracurriculars: 16
635 Frogtown Road
New Canaan, CT 06840
(203) 972-0771
(9)
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Rectory School Photo
Rectory School
Gr: K-9 | 247 students
Avg. class size: 12 students
Sports: 21 | Extracurriculars: 30
528 Pomfret Street
Pomfret, CT 06258
(860) 928-1328
(10)
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Renbrook School Photo
Renbrook School
Gr: NS-8 | 373 students
Avg. class size: 14 students
Sports: 12 | Extracurriculars: 2
2865 Albany Avenue
West Hartford, CT 06117
(860) 236-1661
(20)
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Ridgefield Academy Photo
Ridgefield Academy
Gr: NS-8 | 535 students
Avg. class size: 10 students
Sports: 12 | Extracurriculars: 11
223 West Mountain Rd
Ridgefield, CT 06877
(203) 894-1800
(12)
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St. Joseph High School Photo
St. Joseph High School
Gr: 9-12 | 678 students
Avg. class size: 15 students
Sports: 21 | Extracurriculars: 35
Catholic
2320 Huntington Tpke
Trumbull, CT 06611
(203) 378-9378
(4)
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St. Luke's School Photo
St. Luke's School
Gr: 5-12 | 611 students
Avg. class size: 13 students
Sports: 14 | Extracurriculars: 10
377 North Wilton Road
New Canaan, CT 06840
(203) 801-4833
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South Kent School Photo
South Kent School
Gr: 9-12 | 170 students
Avg. class size: 12 students
Sports: 8 | Extracurriculars: 11
All-boys (Episcopal)
40 Bulls Bridge Road
South Kent, CT 06785
(860) 927-3539
(2)
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Watkinson School Photo
Watkinson School
Gr: 6-12 | 240 students
Avg. class size: 13 students
Sports: 9 | Extracurriculars: 14
180 Bloomfield Avenue
Hartford, CT 06105
(860) 236-5618
(2)
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Westover School Photo
Westover School
Gr: 9-12 | 192 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 26
All-girls
1237 Whittemore Road
Middlebury, CT 06762
(203) 577-4521
(3)
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The Williams School Photo
The Williams School
Gr: 6-12 | 191 students
Avg. class size: 11 students
Sports: 7 | Extracurriculars: 11
182 Mohegan Avenue
New London, CT 06320
(860) 443-5333
(5)
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Fairfield Country Day School Photo
Fairfield Country Day School
Gr: K-9 | 201 students
Avg. class size: 6 students
Sports: 8
All-boys
2970 Bronson Road
Fairfield, CT 06824
(203) 259-2723
(2)
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The Long Ridge School Photo
The Long Ridge School
Gr: NS-5 | 94 students
Avg. class size: 14 students
Extracurriculars: 10
478 Erskine Road
Stamford, CT 06903
(203) 322-7693
(7)
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St. Thomas More School Photo
St. Thomas More School
Gr: 8-12 | 180 students
Avg. class size: 11 students
Sports: 9 | Extracurriculars: 11
45 Cottage Road
Oakdale, CT 06370
(860) 823-3861
(2)
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St. Thomas's Day School Photo
St. Thomas's Day School
Gr: K-6 | 126 students
Avg. class size: 20 students
Sports: 1 | Extracurriculars: 5
Episcopal
830 Whitney Avenue
New Haven, CT 06511
(203) 776-2123
(6)
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Winston Preparatory School CT Photo
Winston Preparatory School CT
Gr: 3-12
Sports: 1 | Extracurriculars: 28
Special Education School
57 West Rocks Road
Norwalk, CT 06851
(203) 229-0465
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All Saints Catholic School Photo
All Saints Catholic School
Gr: PK-8 | 560 students
Avg. class size: 20 students
Sports: 4 | Extracurriculars: 1
Catholic
139 W Rocks Rd
Norwalk, CT 06851
(203) 847-3881
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Show 44 more private schools in Connecticut (out of 79 total schools)
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Frequently Asked Questions

What are the top ranked private schools belonging to National Association of Independent Schools (NAIS) in Connecticut?
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Connecticut include Choate Rosemary Hall, King School, and St. Joseph High School.
How many private schools belonging to National Association of Independent Schools (NAIS) are located in Connecticut?
79 private schools belonging to National Association of Independent Schools (NAIS) are located in Connecticut.
How much do private schools belonging to National Association of Independent Schools (NAIS) cost in Connecticut?
The average tuition cost is $50,757, which is higher than the Connecticut private school average tuition cost of $28,702.
How diverse are private schools belonging to National Association of Independent Schools (NAIS) in Connecticut?
Connecticut private schools belonging to National Association of Independent Schools (NAIS) are approximately 27% minority students, which is lower than the Connecticut private school average of 31%.
What percentage of private schools belonging to National Association of Independent Schools (NAIS) are religiously affiliated in Connecticut?
24% of private schools belonging to National Association of Independent Schools (NAIS) in Connecticut are religiously affiliated (most commonly Catholic and Episcopal).
79
Private Schools
26,552
Students
$50,757
Avg. Tuition
27%
Students of Color
7:1
Student-Teacher Ratio

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