For the 2025 school year, there are 57 private high schools belonging to National Association of Independent Schools (NAIS) serving 21,790 students in Connecticut. You can also find more schools membership associations in Connecticut.
The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in Connecticut include Choate Rosemary Hall, The Loomis Chaffee School, and Hopkins School.
The average tuition cost is $53,283, which is higher than the Connecticut private high school average tuition cost of $39,371.
Top Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in Connecticut (2025)
School
Location
Quick Facts
1108 Whitney Ave
Hamden, CT 06517
(203) 752-2610
Hamden, CT 06517
(203) 752-2610
Gr: NS-12 | 650 students Avg. class size: 12 students Sports: 21 | Extracurrculars: 45 Tuition listed
986 Forest Road
New Haven, CT 06515
(203) 397-1001
New Haven, CT 06515
(203) 397-1001
Gr: 7-12 | 715 students Avg. class size: 12 students Sports: 21 | Extracurrculars: 23 Tuition & acceptance rate listed
73 Southern Blvd
Danbury, CT 06810
(203) 744-1510
Danbury, CT 06810
(203) 744-1510
Gr: 9-12 | 384 students Avg. class size: 15 students Sports: 17 | Extracurrculars: 25 Tuition & acceptance rate listed
1450 Newfield Ave
Stamford, CT 06905
(203) 322-3496
Stamford, CT 06905
(203) 322-3496
Gr: PK-12 | 718 students Avg. class size: 12 students Sports: 19 | Extracurrculars: 42 Tuition listed
170 Kingswood Road
West Hartford, CT 06119
(860) 727-5000
West Hartford, CT 06119
(860) 727-5000
Gr: 6-12 | 507 students Avg. class size: 13 students Sports: 17 | Extracurrculars: 30 Tuition & acceptance rate listed
635 Frogtown Road
New Canaan, CT 06840
(203) 972-0771
New Canaan, CT 06840
(203) 972-0771
Gr: NS-9 | 555 students Avg. class size: 16 students Sports: 13 | Extracurrculars: 16 Tuition & acceptance rate listed
528 Pomfret Street
Pomfret, CT 06258
(860) 928-1328
Pomfret, CT 06258
(860) 928-1328
Gr: K-9 Avg. class size: 10 students Sports: 23 | Extracurrculars: 27 Tuition listed
2320 Huntington Tpke
Trumbull, CT 06611
(203) 378-9378
Trumbull, CT 06611
(203) 378-9378
Gr: 9-12 | 678 students Avg. class size: 15 students Sports: 21 | Extracurrculars: 35 Tuition listed
377 North Wilton Road
New Canaan, CT 06840
(203) 801-4833
New Canaan, CT 06840
(203) 801-4833
Gr: 5-12 | 587 students Avg. class size: 13 students Sports: 14 | Extracurrculars: 10 Tuition & acceptance rate listed
180 Bloomfield Avenue
Hartford, CT 06105
(860) 236-5618
Hartford, CT 06105
(860) 236-5618
Gr: 6-12 | 240 students Avg. class size: 13 students Sports: 9 | Extracurrculars: 14 Tuition & acceptance rate listed
1237 Whittemore Road
Middlebury, CT 06762
(203) 577-4521
Middlebury, CT 06762
(203) 577-4521
Gr: 9-12 | 192 students Avg. class size: 12 students Sports: 16 | Extracurrculars: 26 Tuition & acceptance rate listed
182 Mohegan Avenue
New London, CT 06320
(860) 443-5333
New London, CT 06320
(860) 443-5333
Gr: 6-12 | 191 students Avg. class size: 11 students Sports: 7 | Extracurrculars: 11 Tuition & acceptance rate listed
45 Cottage Road
Oakdale, CT 06370
(860) 823-3861
Oakdale, CT 06370
(860) 823-3861
Gr: 8-12 | 162 students Avg. class size: 9 students Sports: 9 | Extracurrculars: 13 Tuition & acceptance rate listed
40 Bulls Bridge Road
South Kent, CT 06785
(860) 927-3539
South Kent, CT 06785
(860) 927-3539
Gr: 9-12 | 170 students Avg. class size: 15 students Sports: 11 | Extracurrculars: 9 Tuition listed
Avon Old Farms School![Avon Old Farms School Photo - Avon Old Farms School is expert in educating boys. Since we are a single sex school, we use specialized learning methodologies focused on the areas of development that are critical to a young male in their adolescent years. This helps achieve greater success not only in the following four years of college, but the next forty years of their lives.]( "Avon Old Farms School Photo - Avon Old Farms School is expert in educating boys. Since we are a single sex school, we use specialized learning methodologies focused on the areas of development that are critical to a young male in their adolescent years. This helps achieve greater success not only in the following four years of college, but the next forty years of their lives.")
All-boys
500 Old Farms Rd
Avon, CT 06001
(860) 404-4100
Avon, CT 06001
(860) 404-4100
Gr: 9-12 | 415 students Avg. class size: 12 students Sports: 15 Tuition listed
2186 High Ridge Rd
Stamford, CT 06903
(203) 329-2186
Stamford, CT 06903
(203) 329-2186
Gr: PK-12 | 327 students Sports: 3 Tuition & acceptance rate listed
Brunswick School![Brunswick School Photo - Middle School Campus on King Street]( "Brunswick School Photo - Middle School Campus on King Street")
All-boys
100 Maher Avenue
Greenwich, CT 06830
(203) 625-5800
Greenwich, CT 06830
(203) 625-5800
Gr: PK-12 | 1,046 student Avg. class size: 11 students Sports: 20 | Extracurrculars: 14 Tuition & acceptance rate listed
Canterbury School![Canterbury School Photo - At Canterbury School, a balanced educational experience integrates academic achievement, personal growth, and community engagement. As a welcoming interfaith community, Canterbury fosters a sense of belonging, providing passionate educators and transformative opportunities that guide you toward your fullest potential. This is what makes Canterbury School more than just a place to learn-it's a place to become your best self.]( "Canterbury School Photo - At Canterbury School, a balanced educational experience integrates academic achievement, personal growth, and community engagement. As a welcoming interfaith community, Canterbury fosters a sense of belonging, providing passionate educators and transformative opportunities that guide you toward your fullest potential. This is what makes Canterbury School more than just a place to learn-it's a place to become your best self.")
(Catholic)
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3800
New Milford, CT 06776
(860) 210-3800
Gr: 9-12 | 332 students Avg. class size: 12 students Sports: 18 | Extracurrculars: 18 Tuition & acceptance rate listed
565 Chase Parkway
Waterbury, CT 06708
(203) 236-9561
Waterbury, CT 06708
(203) 236-9561
Gr: PK-12 | 164 students Avg. class size: 12 students Sports: 11 Tuition listed
10 Main St
Cheshire, CT 06410
(203) 439-7250
Cheshire, CT 06410
(203) 439-7250
Gr: 9-12 | 369 students Avg. class size: 10 students Sports: 14 | Extracurrculars: 24 Tuition & acceptance rate listed
333 Christian Street
Wallingford, CT 06492
(203) 697-2000
Wallingford, CT 06492
(203) 697-2000
Gr: 9-12 | 865 students Avg. class size: 12 students Sports: 24 Tuition & acceptance rate listed
1073 N Benson Rd
Fairfield, CT 06824
(203) 254-4200
Fairfield, CT 06824
(203) 254-4200
Gr: 9-12 | 757 students
2970 Bronson Road
Fairfield, CT 06824
(203) 259-2723
Fairfield, CT 06824
(203) 259-2723
Gr: K-9 | 197 students Avg. class size: 6 students Sports: 8 Tuition & acceptance rate listed
50 Loomis Place
New Haven, CT 06511
(203) 777-3464
New Haven, CT 06511
(203) 777-3464
Gr: K-9 | 435 students Avg. class size: 14 students Sports: 14 | Extracurrculars: 17 Tuition & acceptance rate listed
99 Green Hill Rd
Washington, CT 06793
(860) 868-7334
Washington, CT 06793
(860) 868-7334
Gr: 9-12 | 330 students Avg. class size: 12 students Sports: 15 | Extracurrculars: 21 Tuition listed
35 Beachside Avenue
Greens Farms, CT 06838
(203) 256-7501
Greens Farms, CT 06838
(203) 256-7501
Gr: PK-12 | 713 students Avg. class size: 15 students Sports: 14 Tuition listed
200 N Maple Ave
Greenwich, CT 06830
(203) 625-8900
Greenwich, CT 06830
(203) 625-8900
Gr: PK-12 | 830 students
401 Old Church Rd
Greenwich, CT 06830
(203) 863-5600
Greenwich, CT 06830
(203) 863-5600
Gr: NS-12 | 1,251 student Tuition & acceptance rate listed
Holy Cross High School![Holy Cross High School Photo - Be A Scholar, Be A Leader, Be Holy Cross]( "Holy Cross High School Photo - Be A Scholar, Be A Leader, Be Holy Cross")
(Catholic)
587 Oronoke Rd
Waterbury, CT 06708
(203) 757-9248
Waterbury, CT 06708
(203) 757-9248
Gr: 9-12 | 413 students Avg. class size: 20 students Sports: 17 | Extracurrculars: 37 Tuition listed
220 Nettleton Hollow Rd
Washington, CT 06793
(860) 868-2230
Washington, CT 06793
(860) 868-2230
Gr: 2-12 | 1,330 student
11 Interlaken Road
Lakeville, CT 06039
(860) 435-3102
Lakeville, CT 06039
(860) 435-3102
Gr: 9-12 | 627 students Avg. class size: 15 students Sports: 23 Tuition & acceptance rate listed
211 Indian Mountain Road
Lakeville, CT 06039
(860) 435-0871
Lakeville, CT 06039
(860) 435-0871
Gr: PK-9 | 320 students Avg. class size: 12 students Sports: 19 | Extracurrculars: 23 Tuition & acceptance rate listed
Kent School![Kent School Photo]( "Kent School Photo")
(Episcopal)
1 Macedonia Road
Kent, CT 06757
(860) 927-6020
Kent, CT 06757
(860) 927-6020
Gr: 9-12 | 504 students Avg. class size: 12 students Sports: 17 | Extracurrculars: 65 Tuition & acceptance rate listed
200 High St
Milford, CT 06460
(203) 877-2786
Milford, CT 06460
(203) 877-2786
Gr: 9-12 Avg. class size: 15 students Sports: 16 | Extracurrculars: 13 Tuition listed
4 Batchelder Road
Windsor, CT 06095
(860) 687-6000
Windsor, CT 06095
(860) 687-6000
Gr: 9-12 | 703 students Avg. class size: 11 students Sports: 20 Tuition & acceptance rate listed
Show 22 more private schools in Connecticut (out of 57 total schools)
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