For the 2025-26 school year, there are 9 private high schools serving 1,403 students in Middlesex County, CT.
The top ranked private high schools in Middlesex County, CT include Adelbrook, Mercy High School, and The Oxford Academy.
The average acceptance rate is 87%, which is higher than the Connecticut private high school average acceptance rate of 65%.
20% of private high schools in Middlesex County, CT are religiously affiliated (most commonly Catholic).
Top Ranked Middlesex County Private High 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
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
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
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
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
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
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 high schools in Middlesex County, CT?
The top ranked private high schools in Middlesex County, CT include Adelbrook, Mercy High School, and The Oxford Academy.
How many private high schools are located in Middlesex County?
9 private high schools are located in Middlesex County.
How diverse are private high schools in Middlesex County?
Middlesex County private high schools are approximately 22% minority students, which is lower than the Connecticut private school average of 30%.
What percentage of private high schools are religiously affiliated in Middlesex County?
20% of private high schools in Middlesex County are religiously affiliated (most commonly Catholic).
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