For the 2025-26 school year, there are 20 private schools serving 2,130 students in Middlesex County, CT (there are 52 public schools, serving 18,234 public students). 10% of all K-12 students in Middlesex County, CT are educated in private schools (compared to the CT state average of 12%).
The top ranked private schools in Middlesex County, CT include Adelbrook, The Children's Tree Montessori School, and Mercy High School.
The average acceptance rate is 82%, which is higher than the Connecticut private school average acceptance rate of 71%.
24% of private schools in Middlesex County, CT are religiously affiliated (most commonly Catholic).
Top Ranked Middlesex County Private Schools (2025-26)
School
Location
Quick Facts
60 Hicksville Rd
Cromwell, CT 06416
(860) 635-5801
Cromwell, CT 06416
(860) 635-5801
Gr: 5-12 | 79 students
96 Essex Rd
Old Saybrook, CT 06475
(860) 388-3536
Old Saybrook, CT 06475
(860) 388-3536
Gr: PK-6 | 102 students Avg. class size: 17 students Sports: 1 | Extracurrculars: 7 Tuition & acceptance rate listed
Mercy High School![Mercy High School Photo]( "Mercy High School Photo")
All-girls (Catholic)
1740 Randolph Road
Middletown, CT 06457
(860) 346-6659
Middletown, CT 06457
(860) 346-6659
Gr: 9-12 | 394 students Avg. class size: 21 students Sports: 17 Tuition & acceptance rate listed
Northwest Childrens Center
Daycare / Preschool
34 Coles Road
Cromwell, CT 06416
(860) 635-3485
Cromwell, CT 06416
(860) 635-3485
Gr: PK-K | 45 students
1393 Boston Post Road
Westbrook, CT 06498
(860) 399-6247
Westbrook, CT 06498
(860) 399-6247
Gr: 8-12 | 48 students Avg. class size: 1 student Sports: 8 | Extracurrculars: 13 Tuition & acceptance rate listed
181 Randolph Rd
Middletown, CT 06457
(860) 346-7735
Middletown, CT 06457
(860) 346-7735
Gr: 9-12 | 600 students Avg. class size: 12 students Sports: 18 | Extracurrculars: 1 Tuition & acceptance rate listed
Essex KinderCare![Essex KinderCare Photo - Essex KinderCare]( "Essex KinderCare Photo - Essex KinderCare")
Daycare / Preschool
158 Westbrook Rd.
Essex, CT 06426
(860) 767-1072
Essex, CT 06426
(860) 767-1072
Gr: NS-PK Tuition listed
140 River Road
East Haddam, CT 06423
(860) 873-2700
East Haddam, CT 06423
(860) 873-2700
Gr: 8-12 | 85 students Avg. class size: 6 students Sports: 5 | Extracurrculars: 3 Tuition listed
Gianelli's Early Learning Center
Montessori School (Catholic)
67 Round Hill Road
Middletown, CT 06457
(860) 346-5765
Middletown, CT 06457
(860) 346-5765
Gr: PK | 47 students Tuition listed
115 Laurel Brook Road
Middlefield, CT 06455
(860) 347-7235
Middlefield, CT 06455
(860) 347-7235
Gr: PK-8 | 143 students Avg. class size: 10 students Sports: 5 | Extracurrculars: 9 Tuition & acceptance rate listed
Joshua Center Shoreline Cdt
Special Education School
5 Research Pkwy
Old Saybrook, CT 06475
(860) 510-0163
Old Saybrook, CT 06475
(860) 510-0163
Gr: 9-12 | 7 students
390 Main Street
Middlefield, CT 06455
(860) 349-0202
Middlefield, CT 06455
(860) 349-0202
Gr: PK-2 | 43 students
Montessori Circle Of Friends
Montessori School
25 W. Main St
Chester, CT 06412
(860) 526-9995
Chester, CT 06412
(860) 526-9995
Gr: PK-K | 26 students
Mt. Saint John
All-boys | Special Education School
135 Kirtland St
Deep River, CT 06417
(860) 343-1300
Deep River, CT 06417
(860) 343-1300
Gr: 9-12 | 39 students
Northwest Village School
Special Education School
20 Tuttle Pl Ste 4
Middletown, CT 06457
(860) 793-3717
Middletown, CT 06457
(860) 793-3717
Gr: 1-12 | 134 students
Rushford Academy School
All-boys | Special Education School
459r Wallingford Rd
Durham, CT 06422
(860) 349-1989
Durham, CT 06422
(860) 349-1989
Gr: 9-12 | 8 students
St. John Paul Ii School
(Catholic)
87 S Main St
Middletown, CT 06457
(860) 347-2978
Middletown, CT 06457
(860) 347-2978
Gr: PK-8 | 189 students
42 Maynard Rd
Old Saybrook, CT 06475
(860) 388-0849
Old Saybrook, CT 06475
(860) 388-0849
Gr: PK-8 | 132 students
Middlesex County Private Schools (Closed)
School
Location
Quick Facts
St. John School (Closed 2010)
(Catholic)
5 Saint Johns Sq
Middletown, CT 06457
(860) 347-3202
Middletown, CT 06457
(860) 347-3202
Gr: K-8 | 114 students
St. Sebastian School (Closed 2006)
(Catholic)
61 Durant Ter
Middletown, CT 06457
(860) 347-3438
Middletown, CT 06457
(860) 347-3438
Gr: PK-8 | 132 students
Frequently Asked Questions
What are the top ranked private schools in Middlesex County, CT?
The top ranked private schools in Middlesex County, CT include Adelbrook, The Children's Tree Montessori School, and Mercy High School.
How many private schools are located in Middlesex County?
20 private schools are located in Middlesex County.
How diverse are private schools in Middlesex County?
Middlesex County private schools are approximately 23% minority students, which is lower than the Connecticut private school average of 31%.
What percentage of students in Middlesex County go to private school?
10% of all K-12 students in Middlesex County are educated in private schools (compared to the CT state average of 12%).
What percentage of private schools are religiously affiliated in Middlesex County?
24% of private schools in Middlesex County are religiously affiliated (most commonly Catholic).
Which private schools in Middlesex County are often viewed compared to one another?
Popular comparisons of private schools in Middlesex County include: Montessori Circle Of Friends vs. The Children's Tree Montessori School, Cromwell KinderCare vs. Middlefield Children's Center
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