#25 Largest Private Schools in District of Columbia
Cornerstone Schools of Washington, DC
Christian school (nondenominational) · Grades K–12
178 students
Washington, DC
B-Overall grade178 students11 students per teacher
2026 lists
Largest Private Schools in District of Columbia
The private schools in District of Columbia with the most students. Top 45 of 45 schools.
#26 Largest Private Schools in District of Columbia
St. Thomas More Catholic
Diocesan school · Grades Pre-K–8
153 students
Washington, DC
B+Overall grade153 students7 students per teacher
#27 Largest Private Schools in District of Columbia
St. Francis Xavier Catholic Academy
Diocesan school · Grades Pre-K–8
149 students
Washington, DC
B-Overall grade149 students11 students per teacher
#28 Largest Private Schools in District of Columbia
The School for Ethics and Global Leadership
Alternative school · Grades 11–12
143 students
Washington, DC
AOverall grade143 students5 students per teacher
#29 Largest Private Schools in District of Columbia
St. Augustine Catholic School
Diocesan school · Grades Pre-K–8
138 students
Washington, DC
BOverall grade138 students10 students per teacher
#30 Largest Private Schools in District of Columbia
Washington Jesuit Academy
Independent Catholic school · Grades 4–8
138 students
Washington, DC
AOverall gradeAll boys138 students8 students per teacher
#31 Largest Private Schools in District of Columbia
River School
Special education school · Grades Pre-K–5
134 students
Washington, DC
AOverall grade134 students5 students per teacher
#32 Largest Private Schools in District of Columbia
Annunciation Catholic School
Parish school · Grades Pre-K–8
130 students
Washington, DC
A+Overall grade130 students6 students per teacher
#33 Largest Private Schools in District of Columbia
Washington School for Girls
Independent Catholic school · Grades 3–8
105 students
Washington, DC
BOverall gradeAll girls105 students9 students per teacher
#34 Largest Private Schools in District of Columbia
Model Secondary School for the Deaf
Special education school · Grades 9–12
101 students
Washington, DC
A+Overall grade101 students1 students per teacher
#35 Largest Private Schools in District of Columbia
San Miguel School
Independent Catholic school · Grades 6–8
89 students
Washington, DC
BOverall gradeAll boys89 students8 students per teacher
#36 Largest Private Schools in District of Columbia
Templeton Academy
Alternative school · Grades 6–12
79 students
Washington, DC
A-Overall grade79 students9 students per teacher
#37 Largest Private Schools in District of Columbia
Aidan Montessori School
Montessori school · Grades Pre-K–6
75 students
Washington, DC
AOverall grade75 students8 students per teacher
#38 Largest Private Schools in District of Columbia
Parkmont School
Independent school · Grades 6–12
70 students
Washington, DC
AOverall grade70 students6 students per teacher
#39 Largest Private Schools in District of Columbia
Christian Family Montessori
Christian (nondenominational) · Montessori · Grades Pre-K–6
67 students
Washington, DC
B+Overall grade67 students12 students per teacher
#40 Largest Private Schools in District of Columbia
St. Jerome Institute
Independent Catholic school · Grades 9–12
61 students
Washington, DC
AOverall grade61 students9 students per teacher
#41 Largest Private Schools in District of Columbia
Mysa School
Alternative school · Grades K–12
30 students
Washington, DC
AOverall grade30 students4 students per teacher
#42 Largest Private Schools in District of Columbia
The Monroe School
Special education school · Grades 6–12
28 students
Washington, DC
A-Overall grade28 students5 students per teacher
#43 Largest Private Schools in District of Columbia
Fusion Academy WDC: Washington D.C.
Independent school · Grades 6–12
27 students
Washington, DC
AOverall grade27 students2 students per teacher
#44 Largest Private Schools in District of Columbia
Kennedy Institute
Special education school · Grades 10–11
26 students
Washington, DC
B+Overall grade26 students5 students per teacher
#45 Largest Private Schools in District of Columbia
Muhammad University of Islam
Islamic school · Grades 1–12
22 students
Washington, DC
22 students5 students per teacher
From official public records, updated October 2026.