#1 Largest Private Schools in Southeastern Connecticut County, CT
St. Bernard School
Diocesan school · Grades 6–12
388 students
Uncasville, CT
B+Overall grade388 students13 students per teacher
2026 lists
Largest Private Schools in Southeastern Connecticut County, CT
The private schools in Southeastern Connecticut County, CT with the most students. Top 18 of 18 schools.
#2 Largest Private Schools in Southeastern Connecticut County, CT
The Williams School
Independent school · Grades 6–12
189 students
New London, CT
A-Overall grade189 students8 students per teacher
#3 Largest Private Schools in Southeastern Connecticut County, CT
St. Michael School
Diocesan school · Grades Pre-K–8
162 students
Pawcatuck, CT
AOverall grade162 students12 students per teacher
#4 Largest Private Schools in Southeastern Connecticut County, CT
St. Thomas More School
Independent school · Grades 8–12
143 students
Oakdale, CT
A+Overall grade143 students6 students per teacher
#5 Largest Private Schools in Southeastern Connecticut County, CT
St. Joseph School
Parish school · Grades K–8
129 students
New London, CT
A+Overall grade129 students10 students per teacher
#6 Largest Private Schools in Southeastern Connecticut County, CT
St. Patrick Cathedral School
Diocesan school · Grades Pre-K–8
129 students
Norwich, CT
A-Overall grade129 students12 students per teacher
#7 Largest Private Schools in Southeastern Connecticut County, CT
Sacred Heart School
Parish school · Grades Pre-K–8
112 students
Groton, CT
A+Overall grade112 students11 students per teacher
#8 Largest Private Schools in Southeastern Connecticut County, CT
Pine Point School
Independent school · Grades Pre-K–9
101 students
Stonington, CT
A+Overall grade101 students4 students per teacher
#9 Largest Private Schools in Southeastern Connecticut County, CT
Baptist Bible Academy
Baptist school · Grades K–12
77 students
Waterford, CT
A-Overall grade77 students7 students per teacher
#10 Largest Private Schools in Southeastern Connecticut County, CT
St. Joseph Elementary School
Parish school · Grades Pre-K–8
68 students
Baltic, CT
A+Overall grade68 students6 students per teacher
#11 Largest Private Schools in Southeastern Connecticut County, CT
Waterford Country School
Special education school · Grades 2–12
65 students
Quaker Hill, CT
AOverall grade65 students4 students per teacher
#12 Largest Private Schools in Southeastern Connecticut County, CT
Bradley School-New London Regional
Independent school · Grades 2–12
53 students
Uncasville, CT
A-Overall grade53 students7 students per teacher
#13 Largest Private Schools in Southeastern Connecticut County, CT
Academy of the Holy Family
Independent Catholic school · Grades 9–12
38 students
Baltic, CT
A+Overall gradeAll girls38 students3 students per teacher
#14 Largest Private Schools in Southeastern Connecticut County, CT
Montessori Discovery School
Montessori school · Grades Pre-K–5
35 students
Norwich, CT
A-Overall grade35 students5 students per teacher
#15 Largest Private Schools in Southeastern Connecticut County, CT
The Light House Voc Ed Center
Special education school · Grades 2–12
28 students
Niantic, CT
B+Overall grade28 students9 students per teacher
#16 Largest Private Schools in Southeastern Connecticut County, CT
North Stonington Christian Academy
Baptist school · Grades Pre-K–12
27 students
North Stonington, CT
AOverall grade27 students4 students per teacher
#17 Largest Private Schools in Southeastern Connecticut County, CT
Lighthouse Voc-Ed Center Learning Campus
Special education school · Grades 2–12
26 students
Niantic, CT
B+Overall grade26 students9 students per teacher
#18 Largest Private Schools in Southeastern Connecticut County, CT
Joshua Center Thames Valley
Special education school · Grades 8–12
22 students
Norwich, CT
B+Overall grade22 students7 students per teacher
From official public records, updated October 2026.