Mount Saint John (MSJ) is a residential treatment program that provides comprehensive and integrated treatment services to adolescent boys and young men who are not able to function in their home community due to combinations of behavioral, emotional, family and educational problems.
The staff and board of Mount Saint John are committed to providing a treatment program to meet the evolving and changing needs of the times and of the boys who come into our care.
At Mount Saint John, we dedicate each day to building a culture of excellence by creating a culture of caring.
Quick Facts (2026)
- School Type: Special Education School
- Grades: 9-12
- Enrollment: 39 students
- Application Deadline: None / Rolling
- Source: National Center for Education Statistics (NCES)
Top Rankings
Mt. Saint John ranks among the top 20% of private schools in Connecticut for:
Category
Attribute
Diversity
School Overview
School Type
Grades Offered
Grades 9-12
Student Body
Total Students
39 students
Student Body Type
% Students of Color
88%
State avg.: 31%
Students by Grade
Academics and Faculty
Total Classroom Teachers
7 teachers
Student-Teacher Ratio
6:1
National avg.: 11:1
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Source: National Center for Education Statistics (NCES)
Frequently Asked Questions
When is the application deadline for Mt. Saint John?
The application deadline for Mt. Saint John is rolling (applications are reviewed as they are received year-round).
In what neighborhood is Mt. Saint John located?
Mt. Saint John is located in the Deep River Center neighborhood of Deep River, CT.
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People that viewed Mt. Saint John also viewed these schools: The Oxford Academy and Brunswick School.
The nearest high school and elementary school to Mt. Saint John is Franklin Academy (3.1 miles away)
The nearest preschool is Montessori Circle Of Friends (3.0 miles away)
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1393 Boston Post Road
Westbrook, CT 06498
(860) 399-6247
Westbrook, CT 06498
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7.8 miles
Gr: 8-12 | 48 students Avg. class size: 1 student Sports: 8 | Extracurrculars: 13 Tuition & acceptance rate listed
Brunswick School ![Brunswick School Photo - Middle School Campus on King Street]( "Brunswick School Photo - Middle School Campus on King Street")
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100 Maher Avenue
Greenwich, CT 06830
(203) 625-5800
Greenwich, CT 06830
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67 miles
Gr: PK-12 | 1,046 students Avg. class size: 11 students Sports: 20 | Extracurrculars: 14 Tuition & acceptance rate listed
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1393 Boston Post Road
Westbrook, CT 06498
(860) 399-6247
Westbrook, CT 06498
(860) 399-6247
7.8 miles
Gr: 8-12 | 48 students Avg. class size: 1 student Sports: 8 | Extracurrculars: 13 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
67 miles
Gr: PK-12 | 1,046 students Avg. class size: 11 students Sports: 20 | Extracurrculars: 14 Tuition & acceptance rate listed
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Location
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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
67 miles
Gr: PK-12 | 1,046 students Avg. class size: 11 students Sports: 20 | Extracurrculars: 14 Tuition & acceptance rate listed
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Location
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Montessori Circle Of Friends
Montessori School
25 W. Main St
Chester, CT 06412
(860) 526-9995
Chester, CT 06412
(860) 526-9995
3 miles
Gr: PK-K | 26 students
140 River Road
East Haddam, CT 06423
(860) 873-2700
East Haddam, CT 06423
(860) 873-2700
3.1 miles
Gr: 8-12 | 85 students Avg. class size: 6 students Sports: 5 | Extracurrculars: 3 Tuition 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
4 miles
Gr: NS-PK Tuition listed
96 Essex Rd
Old Saybrook, CT 06475
(860) 388-3536
Old Saybrook, CT 06475
(860) 388-3536
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Gr: PK-6 | 102 students Avg. class size: 17 students Sports: 1 | Extracurrculars: 7 Tuition & acceptance rate listed
Joshua Center Shoreline Cdt
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5 Research Pkwy
Old Saybrook, CT 06475
(860) 510-0163
Old Saybrook, CT 06475
(860) 510-0163
6.8 miles
Gr: 9-12 | 7 students
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140 River Road
East Haddam, CT 06423
(860) 873-2700
East Haddam, CT 06423
(860) 873-2700
3.1 miles
Gr: 8-12 | 85 students Avg. class size: 6 students Sports: 5 | Extracurrculars: 3 Tuition listed
Joshua Center Shoreline Cdt
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5 Research Pkwy
Old Saybrook, CT 06475
(860) 510-0163
Old Saybrook, CT 06475
(860) 510-0163
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Gr: 9-12 | 7 students
1393 Boston Post Road
Westbrook, CT 06498
(860) 399-6247
Westbrook, CT 06498
(860) 399-6247
7.8 miles
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Oak Hill School At Haddam-killingworth High School
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Higganum, CT 06441
(860) 554-5580
Higganum, CT 06441
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11 Woodland Road
Madison, CT 06443
(203) 433-4658
Madison, CT 06443
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Gr: 4-12 | 14 students Avg. class size: 8 students Tuition & acceptance rate listed
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140 River Road
East Haddam, CT 06423
(860) 873-2700
East Haddam, CT 06423
(860) 873-2700
3.1 miles
Gr: 8-12 | 85 students Avg. class size: 6 students Sports: 5 | Extracurrculars: 3 Tuition listed
96 Essex Rd
Old Saybrook, CT 06475
(860) 388-3536
Old Saybrook, CT 06475
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6.4 miles
Gr: PK-6 | 102 students Avg. class size: 17 students Sports: 1 | Extracurrculars: 7 Tuition & acceptance rate listed
42 Maynard Rd
Old Saybrook, CT 06475
(860) 388-0849
Old Saybrook, CT 06475
(860) 388-0849
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Gr: PK-8 | 132 students
1393 Boston Post Road
Westbrook, CT 06498
(860) 399-6247
Westbrook, CT 06498
(860) 399-6247
7.8 miles
Gr: 8-12 | 48 students Avg. class size: 1 student Sports: 8 | Extracurrculars: 13 Tuition & acceptance rate listed
Oak Hill School At Haddam-killingworth High School
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95 Little City Rd
Higganum, CT 06441
(860) 554-5580
Higganum, CT 06441
(860) 554-5580
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Miles
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Montessori Circle Of Friends
Montessori School
25 W. Main St
Chester, CT 06412
(860) 526-9995
Chester, CT 06412
(860) 526-9995
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Gr: PK-K | 26 students
Essex KinderCare ![Essex KinderCare Photo - Essex KinderCare]( "Essex KinderCare Photo - Essex KinderCare")
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158 Westbrook Rd.
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(860) 767-1072
Essex, CT 06426
(860) 767-1072
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Gr: NS-PK Tuition listed
96 Essex Rd
Old Saybrook, CT 06475
(860) 388-3536
Old Saybrook, CT 06475
(860) 388-3536
6.4 miles
Gr: PK-6 | 102 students Avg. class size: 17 students Sports: 1 | Extracurrculars: 7 Tuition & acceptance rate listed
42 Maynard Rd
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(860) 388-0849
Old Saybrook, CT 06475
(860) 388-0849
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Gr: PK-8 | 132 students
Moodus KinderCare
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Moodus, CT 06469
(860) 873-9666
Moodus, CT 06469
(860) 873-9666
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Gr: NS-PK
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Miles
Quick Facts
John B. Sliney School
(Math: 60-64% | Reading: 50-54%)
Rank:
Rank:
7/
Top 50%10
23 Eades St.
Branford, CT 06405
(203) 481-5386
Branford, CT 06405
(203) 481-5386
9405.3 miles
Gr: PK-4 | 252 students Student-Teacher Ratio: 9:1 Minority enrollment: 36%
Branford High School
(Math: 37% | Reading: 55-59%)
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185 East Main St.
Branford, CT 06405
(203) 488-7291
Branford, CT 06405
(203) 488-7291
9405.6 miles
Gr: 9-12 | 738 students Student-Teacher Ratio: 11:1 Minority enrollment: 33%
Mary R. Tisko School
(Math: 55-59% | Reading: 55-59%)
Rank:
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118 Damascus Rd.
Branford, CT 06405
(203) 483-1826
Branford, CT 06405
(203) 483-1826
9405.6 miles
Gr: PK-4 | 365 students Student-Teacher Ratio: 12:1 Minority enrollment: 18%
Francis Walsh Intermediate School
(Math: 46% | Reading: 52%)
Rank:
Rank:
6/
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185 Damascus Rd.
Branford, CT 06405
(203) 488-8317
Branford, CT 06405
(203) 488-8317
9405.7 miles
Gr: 5-8 | 775 students Student-Teacher Ratio: 11:1 Minority enrollment: 35%
335 Foxon Rd.
North Branford, CT 06471
(203) 484-1235
North Branford, CT 06471
(203) 484-1235
9406.3 miles
Gr: PK-2 | 385 students Student-Teacher Ratio: 13:1 Minority enrollment: 18%
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