#1 Largest Private Schools in Harford County, MD
John Carroll School
Independent Catholic school · Grades 9–12
734 students
Bel Air, MD
B+Overall grade734 students11 students per teacher
2026 lists
Largest Private Schools in Harford County, MD
The private schools in Harford County, MD with the most students. Top 14 of 14 schools.
#2 Largest Private Schools in Harford County, MD
St. Margaret School
Parish school · Grades K–8
596 students
Bel Air, MD
BOverall grade596 students15 students per teacher
#3 Largest Private Schools in Harford County, MD
Harford Christian School
Christian school (nondenominational) · Grades Pre-K–12
490 students
Darlington, MD
B-Overall grade490 students10 students per teacher
#4 Largest Private Schools in Harford County, MD
Harford Day School
Independent school · Grades Pre-K–8
261 students
Bel Air, MD
B+Overall grade261 students7 students per teacher
#5 Largest Private Schools in Harford County, MD
St. Joan of Arc School
Diocesan school · Grades Pre-K–8
184 students
Aberdeen, MD
B+Overall grade184 students15 students per teacher
#6 Largest Private Schools in Harford County, MD
St. Joan of Arc
Diocesan school · Grades Pre-K–8
184 students
Aberdeen, MD
BOverall grade184 students15 students per teacher
#7 Largest Private Schools in Harford County, MD
Grace Classical Academy
Christian school (nondenominational) · Grades Pre-K–11
171 students
Bel Air, MD
B+Overall grade171 students11 students per teacher
#8 Largest Private Schools in Harford County, MD
Trinity Lutheran Christian School & Early LRNG CTR
Lutheran school · Grades Pre-K–8
145 students
Joppa, MD
AOverall grade145 students8 students per teacher
#9 Largest Private Schools in Harford County, MD
The Highlands School
Special education school · Grades 1–12
67 students
Bel Air, MD
AOverall grade67 students4 students per teacher
#10 Largest Private Schools in Harford County, MD
Bridges Montessori of Towson
Montessori school · Grades Pre-K–6
55 students
Bel Air, MD
B+Overall grade55 students9 students per teacher
#11 Largest Private Schools in Harford County, MD
High Road School of Harford County
Special education school · Grades 2–12
44 students
Belcamp, MD
B+Overall grade44 students6 students per teacher
#12 Largest Private Schools in Harford County, MD
Emmorton Baptist Academy
Baptist school · Grades K–12
44 students
Bel Air, MD
A+Overall grade44 students4 students per teacher
#13 Largest Private Schools in Harford County, MD
Bethel Christian Academy
Pentecostal school · Grades Pre-K–12
39 students
Havre de Grace, MD
AOverall grade39 students6 students per teacher
#14 Largest Private Schools in Harford County, MD
One School Global-Chesapeake Campus
Brethren school · Grades 3–12
26 students
Joppa, MD
AOverall grade26 students9 students per teacher
From official public records, updated October 2026.