#1 Largest Private Schools in Naugatuck Valley County, CT
Yeshiva K'tana of Waterbury
Jewish day school · Grades Pre-K–8
583 students
Waterbury, CT
BOverall grade583 students6 students per teacher
2026 lists
Largest Private Schools in Naugatuck Valley County, CT
The private schools in Naugatuck Valley County, CT with the most students. Top 19 of 19 schools.
#2 Largest Private Schools in Naugatuck Valley County, CT
Holy Cross High School
Independent Catholic school · Grades 9–12
495 students
Waterbury, CT
B+Overall grade495 students13 students per teacher
#3 Largest Private Schools in Naugatuck Valley County, CT
St. Paul Catholic High School
Diocesan school · Grades 9–12
388 students
Bristol, CT
B-Overall grade388 students14 students per teacher
#4 Largest Private Schools in Naugatuck Valley County, CT
The Cheshire Academy
Independent school · Grades 9–12
341 students
Cheshire, CT
A+Overall grade341 students6 students per teacher
#5 Largest Private Schools in Naugatuck Valley County, CT
Catholic Academy of Waterbury
Diocesan school · Grades Pre-K–8
171 students
Waterbury, CT
B+Overall grade171 students16 students per teacher
#6 Largest Private Schools in Naugatuck Valley County, CT
St. Joseph School
Parish school · Grades Pre-K–8
171 students
Bristol, CT
AOverall grade171 students13 students per teacher
#7 Largest Private Schools in Naugatuck Valley County, CT
Assumption School
Parish school · Grades Pre-K–8
163 students
Ansonia, CT
B+Overall grade163 students14 students per teacher
#8 Largest Private Schools in Naugatuck Valley County, CT
St. Matthew School
Diocesan school · Grades Pre-K–8
142 students
Bristol, CT
A+Overall grade142 students10 students per teacher
#9 Largest Private Schools in Naugatuck Valley County, CT
Westover School
Independent school · Grades 9–12
142 students
Middlebury, CT
A+Overall gradeAll girls142 students5 students per teacher
#10 Largest Private Schools in Naugatuck Valley County, CT
St. Mary Magdalen School
Parish school · Grades Pre-K–4
137 students
Oakville, CT
A+Overall grade137 students9 students per teacher
#11 Largest Private Schools in Naugatuck Valley County, CT
Children's Community School
Independent school · Grades Pre-K–8
129 students
Waterbury, CT
B+Overall grade129 students9 students per teacher
#12 Largest Private Schools in Naugatuck Valley County, CT
Holy Trinity Catholic Academy
Diocesan school · Grades Pre-K–8
120 students
Shelton, CT
A+Overall grade120 students9 students per teacher
#13 Largest Private Schools in Naugatuck Valley County, CT
St. John the Evangelist School
Diocesan school · Grades 5–8
101 students
Watertown, CT
B+Overall grade101 students14 students per teacher
#14 Largest Private Schools in Naugatuck Valley County, CT
St. John's School
Parish school · Grades 5–8
101 students
Watertown, CT
B+Overall grade101 students13 students per teacher
#15 Largest Private Schools in Naugatuck Valley County, CT
Immanuel Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
87 students
Bristol, CT
BOverall grade87 students11 students per teacher
#16 Largest Private Schools in Naugatuck Valley County, CT
Bais Yaakov of Waterbury High School
Jewish day school · Grades 9–12
86 students
Naugatuck, CT
B+Overall gradeAll girls86 students4 students per teacher
#17 Largest Private Schools in Naugatuck Valley County, CT
The Woodhall School
Alternative school · Grades 9–12
45 students
Bethlehem, CT
AOverall gradeAll boys45 students3 students per teacher
#18 Largest Private Schools in Naugatuck Valley County, CT
Aspire Living & Learning Academy
Special education school · Grades 1–12
31 students
Naugatuck, CT
B+Overall grade31 students6 students per teacher
#19 Largest Private Schools in Naugatuck Valley County, CT
Alpha & Omega Christian Academy
Pentecostal school · Grades K–10
20 students
Waterbury, CT
AOverall grade20 students4 students per teacher
From official public records, updated October 2026.