#1 Largest Private Schools in Greenwich, CT
The Greenwich Country Day School
Independent school · Grades Pre-K–12
1,315 students
Greenwich, CT
BOverall grade1,315 students8 students per teacher
2026 lists
Largest Private Schools in Greenwich, CT
The private schools in Greenwich, CT with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Greenwich, CT
Greenwich Academy
Independent school · Grades Pre-K–12
802 students
Greenwich, CT
A+Overall gradeAll girls802 students7 students per teacher
#3 Largest Private Schools in Greenwich, CT
Sacred Heart Greenwich
Diocesan school · Grades Pre-K–12
588 students
Greenwich, CT
B-Overall gradeAll girls588 students22 students per teacher
#4 Largest Private Schools in Greenwich, CT
Greenwich Catholic School
Diocesan school · Grades Pre-K–8
294 students
Greenwich, CT
A+Overall grade294 students10 students per teacher
#5 Largest Private Schools in Greenwich, CT
Eagle Hill School
Special education school · Grades 1–9
254 students
Greenwich, CT
AOverall grade254 students5 students per teacher
#6 Largest Private Schools in Greenwich, CT
Whitby School
Montessori school · Grades Pre-K–8
253 students
Greenwich, CT
A+Overall grade253 students3 students per teacher
From official public records, updated October 2026.