Cobb School Montessori Photo - Cobb School stays true to its core values - Respect, Responsibility, Independence, and Integrity.

Top 20 Best Connecticut Nonsectarian Private Schools (2025)

For the 2025 school year, there are 203 nonsectarian private schools in Connecticut. You can also find more religiously affiliated schools in Connecticut.
The top ranked nonsectarian private schools in Connecticut include Choate Rosemary Hall, Hopkins School, and Brunswick School.

Top Ranked Nonsectarian Private Schools in Connecticut (2025)

School
Location
Grades
Students
Easton Country Day School
Easton Country Day School Photo - Easton Country Day
(13)
660 Morehouse Road
Easton, CT 06612
(203) 268-5530
Grades: PK-12
| 246 students
Hopkins School
Hopkins School Photo - Hopkins is a grade 7-12 grade gender-inclusive learning community located on 108 acres overlooking New Haven.
(6)
986 Forest Road
New Haven, CT 06515
(203) 397-1001
Grades: 7-12
| 715 students
King School
King School Photo - Grade 1 students participating in STEM activities.
1450 Newfield Ave
Stamford, CT 06905
(203) 322-3496
Grades: PK-12
| 718 students
Kingswood Oxford School
Kingswood Oxford School Photo - Our mission and core values are the grounding force within our school, its very soul. Our mission is why we are here. Our values are what we do. Ask any KO student about the core value that resonates with them the most, and you`ll get thoughtful and meaningful answers. 'Care beyond self' always tops the list.
(1)
170 Kingswood Road
West Hartford, CT 06119
(860) 727-5000
Grades: 6-12
| 504 students
New Canaan Country School
New Canaan Country School Photo - Academics, arts, music and athletics are woven into our students' day to pique their curiosity and instill a joy of learning.
(9)
635 Frogtown Road
New Canaan, CT 06840
(203) 972-0771
Grades: NS-9
| 555 students
Renbrook School
Renbrook School Photo - Renbrook School provides students in preschool through grade eight with a robust, purposeful, and developmentally appropriate educational experience of the highest caliber. Small classes in an intimate community of supportive and caring teachers allow for an individualized approach to learning enabling each child to learn to take appropriate risks and identify and cultivate his or her own strengths.
(17)
2865 Albany Avenue
West Hartford, CT 06117
(860) 236-1661
Grades: NS-8
| 370 students
Ridgefield Academy
Ridgefield Academy Photo - At Ridgefield Academy, imaginations flourish and academic excellence takes root. Here, the dreamers of today become the thinkers of tomorrow.
(11)
223 West Mountain Rd
Ridgefield, CT 06877
(203) 894-1800
Grades: NS-8
| 448 students
St. Luke's School
St. Luke's School Photo - An aerial view of the St. Luke's 40-acre campus in New Canaan, CT.
377 North Wilton Road
New Canaan, CT 06840
(203) 801-4833
Grades: 5-12
| 586 students
Watkinson School
Watkinson School Photo - 225 students from 43 towns, reflecting a wide range of academic, personal and socioeconomic backgrounds. Faculty includes 43 teachers, 26 of whom hold master's degrees or above. Student-teacher ratio 6:1. Average class size 14
(2)
180 Bloomfield Avenue
Hartford, CT 06105
(860) 236-5618
Grades: 6-12
| 240 students
Westover School
Westover School Photo
All-girls
(2)
1237 Whittemore Road
Middlebury, CT 06762
(203) 577-4521
Grades: 9-12
| 155 students
The Williams School
The Williams School Photo
(5)
182 Mohegan Avenue
New London, CT 06320
(860) 443-5333
Grades: 6-12
| 191 students
285 Lafayette Street
Bridgeport, CT 06604
(203) 334-3434
Grades: 9-12
| 62 students
Fusion Academy Fairfield
Fusion Academy Fairfield Photo - Each Fusion campus has a state-of-the-art music studio with professional-grade tools. Students can explore instruments, vocals, songwriting, DJ performing arts, and more.
Alternative School
777 Commerce Drive, Suite 100
Fairfield, CT 06824
(877) 673-8893
Grades: 6-12
| 14 students
Fusion Academy Greenwich
Fusion Academy Greenwich Photo - Each Fusion campus has a state-of-the-art music studio with professional-grade tools. Students can explore instruments, vocals, songwriting, DJ performing arts, and more.
Alternative School
66 Gatehouse Road
Stamford, CT 06902
(877) 673-8893
Grades: 6-12
| n/a students
The Long Ridge School
The Long Ridge School Photo - Micheal G. Harris Arts and Athletics Center
(7)
478 Erskine Road
Stamford, CT 06903
(203) 322-7693
Grades: NS-5
| 94 students
Adelbrook
Special Education School
(1)
60 Hicksville Rd
Cromwell, CT 06416
(860) 635-5801
Grades: 5-12
| 79 students
Adelbrook-the Learning Center Of Manchester
Special Education School
42 Prospect St
Manchester, CT 06040
(860) 645-1255
Grades: K-6
| 26 students
ATLAS - Academic Theatre Lab on Audubon
ATLAS - Academic Theatre Lab on Audubon Photo
Special Program Emphasis
100 Audubon St.
New Haven, CT 06510
(203) 624-5189
Grades: 7-9
| 20 students
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.
All-boys
500 Old Farms Rd
Avon, CT 06001
(860) 404-4100
Grades: 9-12
| 415 students
Belden Hill Montessori
Montessori School
345 Belden Hill Rd
Wilton, CT 06897
(203) 762-8500
Grades: PK-K
| 24 students
Benhaven Academy
Special Education School
50 N Plains Hwy
Wallingford, CT 06492
(203) 774-0008
Grades: 5-12
| 32 students
Brunswick School
Brunswick School Photo - Middle School Campus on King Street
All-boys
100 Maher Avenue
Greenwich, CT 06830
(203) 625-5800
Grades: PK-12
| 1,046 students
The Burlington Academy Of Learning
The Burlington Academy Of Learning Photo - The Burlington Academy of Learning
Daycare / Preschool
10 Covey Rd.
Burlington, CT 06013
(860) 675-3598
Grades: PK-K
| 58 students
565 Chase Parkway
Waterbury, CT 06708
(203) 236-9561
Grades: PK-12
| 164 students
Cheshire Academy
Cheshire Academy Photo - Character development has long been a priority at Cheshire Academy. The Eight Pillars of Bowden are the ways in which we demonstrate our core values and basic beliefs: Respect, Responsibility, Caring, Civility, Citizenship, Morality, Fairness and Trustworthiness.
10 Main St
Cheshire, CT 06410
(203) 439-7250
Grades: 9-12
| 369 students
The Children's Tree Montessori School
The Children's Tree Montessori School Photo - Learning to make words with the movable alphabet in the primary (preschool) classroom.
Montessori School
(4)
96 Essex Rd
Old Saybrook, CT 06475
(860) 388-3536
Grades: PK-6
| 102 students
Choate Rosemary Hall
Choate Rosemary Hall Photo - A community like no other, Choate is a place where you never have to do it alone. Advisers, peers, and the entire community are bonded by mutual respect, a passion for learning, and a spirit of supporting and challenging one another:
333 Christian Street
Wallingford, CT 06492
(203) 697-2000
Grades: 9-12
| 865 students
Connecticut Junior Republic
All-boys | Special Education School
(3)
550 Goshen Road
Litchfield, CT 06759
(860) 567-9423
Grades: 7-12
| 28 students
Connecticut Junior Republic-bristol
All-girls | Special Education School
(1)
30 Pleasant St
Bristol, CT 06010
(860) 845-8010
Grades: 6-12
| 59 students
Eagle Hill School
Eagle Hill School Photo - Eagle Hill School's Campus
Special Education School
(5)
45 Glenville Road
Greenwich, CT 06831
(203) 622-9240
Grades: 1-8
| 265 students
Eagle House Education Program
Special Education School
1680 Albany Ave
Hartford, CT 06105
(860) 297-0552
Grades: 1-8
| 20 students
The Ethel Walker School
The Ethel Walker School Photo
All-girls
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
Grades: 6-12
| 226 students
Fairfield Country Day School
Fairfield Country Day School Photo - FCDS Campus
All-boys
(2)
2970 Bronson Road
Fairfield, CT 06824
(203) 259-2723
Grades: K-9
| 197 students
Foote School
Foote School Photo
(3)
50 Loomis Place
New Haven, CT 06511
(203) 777-3464
Grades: K-9
| 435 students
99 Green Hill Rd
Washington, CT 06793
(860) 868-7334
Grades: 9-12
| 330 students
Show 100 more private schools in Connecticut (out of 203 total schools)
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