The average private high school in Connecticut has 207 students (2025).
The largest private high school in Connecticut is The Greenwich Country Day School with 1,345 students.
School Size Range: 385
1,345
Avg. School Size: 637
Largest Connecticut Private High Schools (2025)
School
# Students
Grades
Location
Rank: #11.
Students: 1,345
Grades: PK-12
401 Old Church Rd.
Greenwich, CT 06830
(203) 865-5600
Greenwich, CT 06830
(203) 865-5600
Students: 1,330
Grades: 2-12
220 Nettleton Hollow Rd
Washington, CT 06793
(860) 868-2230
Washington, CT 06793
(860) 868-2230
Rank: #33.
Students: 1,251
Grades: NS-12
401 Old Church Rd
Greenwich, CT 06830
(203) 863-5600
Greenwich, CT 06830
(203) 863-5600
Rank: #44.
Brunswick School![Brunswick School Photo - Middle School Campus on King Street]( "Brunswick School Photo - Middle School Campus on King Street")
All-boys
Students: 1,046
Grades: PK-12
100 Maher Avenue
Greenwich, CT 06830
(203) 625-5800
Greenwich, CT 06830
(203) 625-5800
Rank: #55.
Students: 865
Grades: 9-12
333 Christian Street
Wallingford, CT 06492
(203) 697-2000
Wallingford, CT 06492
(203) 697-2000
Rank: #66.
Students: 830
Grades: PK-12
200 N Maple Ave
Greenwich, CT 06830
(203) 625-8900
Greenwich, CT 06830
(203) 625-8900
Rank: #77.
Students: 757
Grades: 9-12
1073 N Benson Rd
Fairfield, CT 06824
(203) 254-4200
Fairfield, CT 06824
(203) 254-4200
Rank: #99.
Students: 715
Grades: 7-12
986 Forest Road
New Haven, CT 06515
(203) 397-1001
New Haven, CT 06515
(203) 397-1001
Rank: #1010.
Students: 713
Grades: PK-12
35 Beachside Avenue
Greens Farms, CT 06838
(203) 256-7501
Greens Farms, CT 06838
(203) 256-7501
Rank: #1111.
Students: 705
Grades: 9-12
2320 Huntington Tpke
Trumbull, CT 06611
(203) 378-9378
Trumbull, CT 06611
(203) 378-9378
Rank: #1212.
Students: 703
Grades: 9-12
4 Batchelder Road
Windsor, CT 06095
(860) 687-6000
Windsor, CT 06095
(860) 687-6000
Rank: #1313.
Students: 680
Grades: PK-12
1177 King Street
Greenwich, CT 06831
(609) 261-2273
Greenwich, CT 06831
(609) 261-2273
Rank: #1414.
Students: 650
Grades: NS-12
1108 Whitney Ave
Hamden, CT 06517
(203) 752-2610
Hamden, CT 06517
(203) 752-2610
Rank: #1515.
Students: 623
Grades: 9-12
11 Interlaken Road
Lakeville, CT 06039
(860) 435-3102
Lakeville, CT 06039
(860) 435-3102
Rank: #1616.
Students: 600
Grades: 9-12
181 Randolph Rd
Middletown, CT 06457
(860) 346-7735
Middletown, CT 06457
(860) 346-7735
Rank: #1717.
Students: 586
Grades: 5-12
377 North Wilton Road
New Canaan, CT 06840
(203) 801-4833
New Canaan, CT 06840
(203) 801-4833
Rank: #1818.
Students: 580
Grades: 9-12
110 Woodbury Road
Watertown, CT 06795
(860) 945-7777
Watertown, CT 06795
(860) 945-7777
Rank: #1919.
Students: 555
Grades: NS-9
635 Frogtown Road
New Canaan, CT 06840
(203) 972-0771
New Canaan, CT 06840
(203) 972-0771
Rank: #2020.
Students: 518
Grades: 9-12
24 Ricardo St
West Haven, CT 06516
(203) 937-3217
West Haven, CT 06516
(203) 937-3217
Rank: #2121.
Students: 506
Grades: 9-12
220 Jefferson St
Fairfield, CT 06825
(203) 372-6521
Fairfield, CT 06825
(203) 372-6521
Rank: #22 - 2322. - 23.
Kent School![Kent School Photo]( "Kent School Photo")
(Episcopal)
Students: 504
Grades: 9-12
1 Macedonia Road
Kent, CT 06757
(860) 927-6020
Kent, CT 06757
(860) 927-6020
Rank: #22 - 2322. - 23.
Students: 504
Grades: 6-12
170 Kingswood Road
West Hartford, CT 06119
(860) 727-5000
West Hartford, CT 06119
(860) 727-5000
Rank: #2424.
East Catholic High School![East Catholic High School Photo]( "East Catholic High School Photo")
(Catholic)
Students: 479
Grades: 9-12
115 New State Rd
Manchester, CT 06042
(860) 649-5336
Manchester, CT 06042
(860) 649-5336
Rank: #2525.
Students: 444
Grades: 9-12
29 Wampanoag Drive
West Hartford, CT 06117
(860) 236-4221
West Hartford, CT 06117
(860) 236-4221
Rank: #2626.
Students: 435
Grades: K-9
50 Loomis Place
New Haven, CT 06511
(203) 777-3464
New Haven, CT 06511
(203) 777-3464
Rank: #2727.
Students: 421
Grades: PK-12
569 Maple Hill Ave
Newington, CT 06111
(860) 667-3407
Newington, CT 06111
(860) 667-3407
Rank: #2828.
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
Students: 415
Grades: 9-12
500 Old Farms Rd
Avon, CT 06001
(860) 404-4100
Avon, CT 06001
(860) 404-4100
Rank: #2929.
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)
Students: 413
Grades: 9-12
587 Oronoke Rd
Waterbury, CT 06708
(203) 757-9248
Waterbury, CT 06708
(203) 757-9248
Rank: #3030.
Students: 412
Grades: 9-12
995 Hopmeadow Street
Simsbury, CT 06070
(860) 408-3043
Simsbury, CT 06070
(860) 408-3043
Rank: #31 - 3231. - 32.
St. Bernard School![St. Bernard School Photo - Saint Bernard School XBSS leaders.]( "St. Bernard School Photo - Saint Bernard School XBSS leaders.")
(Catholic)
Students: 410
Grades: 6-12
1593 Norwich New London Tpke
Uncasville, CT 06382
(860) 848-1271
Uncasville, CT 06382
(860) 848-1271
Rank: #31 - 3231. - 32.
Students: 410
Grades: 9-12
185 North Main Street
Suffield, CT 06078
(860) 386-4400
Suffield, CT 06078
(860) 386-4400
Rank: #3333.
St. Paul Catholic High School![St. Paul Catholic High School Photo - Respect Life Mass 2023]( "St. Paul Catholic High School Photo - Respect Life Mass 2023")
(Catholic)
Students: 400
Grades: 9-12
1001 Stafford Ave
Bristol, CT 06010
(860) 584-0911
Bristol, CT 06010
(860) 584-0911
Rank: #3434.
Mercy High School![Mercy High School Photo]( "Mercy High School Photo")
All-girls (Catholic)
Students: 394
Grades: 9-12
1740 Randolph Road
Middletown, CT 06457
(860) 346-6659
Middletown, CT 06457
(860) 346-6659
Rank: #3535.
Students: 385
Grades: K-12
575 White Plains Rd
Trumbull, CT 06611
(203) 261-6230
Trumbull, CT 06611
(203) 261-6230
Show 100 more private schools in CT (out of 177 total schools)
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Frequently Asked Questions
What is the Connecticut average private high schools student size?
The Connecticut average private high schools student size is 207 for 2025.
What are the private high schools with the largest student size in Connecticut?
The top ranked private high schools in Connecticut include The Greenwich Country Day School, Horace Mann School John Dorr Nature Laboratory and Greenwich Country Day School.
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