#1 Largest Private Schools in Washington, DC
St. Johns College High School
Independent Catholic school · Grades 9–12
1,794 students
Washington, DC
B+Overall grade1,794 students20 students per teacher
2026 lists
Largest Private Schools in Washington, DC
The private schools in Washington, DC with the most students. Top 44 of 44 schools.
#2 Largest Private Schools in Washington, DC
Caroline Education Community International Psa
Islamic school · Grades Pre-K–12
1,390 students
Washington, DC
B-Overall grade1,390 students16 students per teacher
#3 Largest Private Schools in Washington, DC
Sidwell Friends School
Quaker (Friends) school · Grades Pre-K–12
1,129 students
Washington, DC
A+Overall grade1,129 students8 students per teacher
#4 Largest Private Schools in Washington, DC
Sidwell Friends School
Quaker (Friends) school · Grades Pre-K–12
1,123 students
Washington, DC
A+Overall grade1,123 students9 students per teacher
#5 Largest Private Schools in Washington, DC
Washington International School
Independent school · Grades Pre-K–12
846 students
Washington, DC
A+Overall grade846 students7 students per teacher
#6 Largest Private Schools in Washington, DC
National Cathedral School
Episcopal school · Grades 4–12
597 students
Washington, DC
A+Overall gradeAll girls597 students8 students per teacher
#7 Largest Private Schools in Washington, DC
Georgetown Visitation Preparatory School
Independent Catholic school · Grades 9–12
512 students
Washington, DC
A+Overall gradeAll girls512 students11 students per teacher
#8 Largest Private Schools in Washington, DC
Blessed Sacrament School
Parish school · Grades K–8
502 students
Washington, DC
B-Overall grade502 students12 students per teacher
#9 Largest Private Schools in Washington, DC
Milton Gottesman Jewish Day School of the Nation's
Jewish day school · Grades Pre-K–8
449 students
Washington, DC
BOverall grade449 students8 students per teacher
#10 Largest Private Schools in Washington, DC
St. Patrick's Episcopal Day School
Episcopal school · Grades Pre-K–8
424 students
Washington, DC
AOverall grade424 students7 students per teacher
#11 Largest Private Schools in Washington, DC
Archbishop Carroll High School
Diocesan school · Grades 9–12
384 students
Washington, DC
B+Overall grade384 students13 students per teacher
#12 Largest Private Schools in Washington, DC
The Field School
Independent school · Grades 6–12
351 students
Washington, DC
A+Overall grade351 students7 students per teacher
#13 Largest Private Schools in Washington, DC
Holy Trinity School
Parish school · Grades Pre-K–8
315 students
Washington, DC
A-Overall grade315 students9 students per teacher
#14 Largest Private Schools in Washington, DC
Edmund Burke School
Independent school · Grades 6–12
315 students
Washington, DC
A+Overall grade315 students8 students per teacher
#15 Largest Private Schools in Washington, DC
Beauvoir the National Cathedral Elementary School
Episcopal school · Grades Pre-K–3
313 students
Washington, DC
BOverall grade313 students15 students per teacher
#16 Largest Private Schools in Washington, DC
Lowell School
Independent school · Grades Pre-K–8
270 students
Washington, DC
A+Overall grade270 students4 students per teacher
#17 Largest Private Schools in Washington, DC
St. Anselm's Abbey School
Diocesan school · Grades 6–12
224 students
Washington, DC
A+Overall gradeAll boys224 students6 students per teacher
#18 Largest Private Schools in Washington, DC
Capitol Hill Day School
Independent school · Grades Pre-K–8
221 students
Washington, DC
A+Overall grade221 students4 students per teacher
#19 Largest Private Schools in Washington, DC
Sheridan School
Independent school · Grades K–8
221 students
Washington, DC
A+Overall grade221 students7 students per teacher
#20 Largest Private Schools in Washington, DC
St. Peter School
Diocesan school · Grades Pre-K–8
210 students
Washington, DC
A+Overall grade210 students7 students per teacher
#21 Largest Private Schools in Washington, DC
St. Anthony Catholic School
Parish school · Grades K–8
195 students
Washington, DC
A+Overall grade195 students6 students per teacher
#22 Largest Private Schools in Washington, DC
Our Lady of Victory School
Diocesan school · Grades Pre-K–8
186 students
Washington, DC
BOverall grade186 students12 students per teacher
#23 Largest Private Schools in Washington, DC
Sacred Heart School
Diocesan school · Grades Pre-K–8
186 students
Washington, DC
BOverall grade186 students12 students per teacher
#24 Largest Private Schools in Washington, DC
Cornerstone Schools of Washington, DC
Christian school (nondenominational) · Grades K–12
178 students
Washington, DC
B-Overall grade178 students11 students per teacher
From official public records, updated October 2026.