#1 Largest Private Schools in Howard County, MD
Glenelg Country School
Independent school · Grades Pre-K–12
705 students
Ellicott City, MD
A+Overall grade705 students8 students per teacher
2026 lists
Largest Private Schools in Howard County, MD
The private schools in Howard County, MD with the most students. Top 28 of 28 schools.
#2 Largest Private Schools in Howard County, MD
St. Louis School
Diocesan school · Grades Pre-K–8
497 students
Clarksville, MD
BOverall grade497 students15 students per teacher
#3 Largest Private Schools in Howard County, MD
Resurrection St. Paul School
Diocesan school · Grades Pre-K–8
445 students
Ellicott City, MD
B+Overall grade445 students15 students per teacher
#4 Largest Private Schools in Howard County, MD
Mount Airy Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
416 students
Mount Airy, MD
B-Overall grade416 students14 students per teacher
#5 Largest Private Schools in Howard County, MD
Chapelgatechristianacademy
Presbyterian school · Grades K–12
386 students
Marriottsville, MD
A+Overall grade386 students11 students per teacher
#6 Largest Private Schools in Howard County, MD
St. Augustine School
Diocesan school · Grades Pre-K–8
223 students
Elkridge, MD
BOverall grade223 students16 students per teacher
#7 Largest Private Schools in Howard County, MD
Trinity School
Independent Catholic school · Grades Pre-K–8
212 students
Ellicott City, MD
A+Overall grade212 students9 students per teacher
#8 Largest Private Schools in Howard County, MD
Atholton Adventist Academy
Seventh-day Adventist school · Grades Pre-K–12
206 students
Columbia, MD
BOverall grade206 students12 students per teacher
#9 Largest Private Schools in Howard County, MD
Bethel Christian Academy
Assembly of God school · Grades Pre-K–8
201 students
Savage, MD
BOverall grade201 students11 students per teacher
#10 Largest Private Schools in Howard County, MD
Our Lady of Perpetual Help School
Diocesan school · Grades Pre-K–8
190 students
Ellicott City, MD
A+Overall grade190 students13 students per teacher
#11 Largest Private Schools in Howard County, MD
Maryland International School
Independent school · Grades 1–12
185 students
Elkridge, MD
A+Overall grade185 students7 students per teacher
#12 Largest Private Schools in Howard County, MD
Tarbiyah Academy
Islamic school · Grades K–8
176 students
Elkridge, MD
A-Overall grade176 students8 students per teacher
#13 Largest Private Schools in Howard County, MD
Columbia Academy
Independent school · Grades K–8
173 students
Columbia, MD
B+Overall grade173 students9 students per teacher
#14 Largest Private Schools in Howard County, MD
St. Johns Parish Day School
Episcopal school · Grades Pre-K–5
168 students
Ellicott City, MD
AOverall grade168 students9 students per teacher
#15 Largest Private Schools in Howard County, MD
Fusion Columbia
Alternative school · Grades 7–12
75 students
Columbia, MD
B+Overall grade75 students4 students per teacher
#16 Largest Private Schools in Howard County, MD
Phillips School - Laurel
Special education school · Grades 3–12
67 students
Laurel, MD
BOverall grade67 students5 students per teacher
#17 Largest Private Schools in Howard County, MD
Aya Center
Independent school · Grades Pre-K–5
64 students
Columbia, MD
BOverall grade64 students21 students per teacher
#18 Largest Private Schools in Howard County, MD
Glenwood Academy
Special education school · Grades 3–12
59 students
Glenwood, MD
AOverall grade59 students3 students per teacher
#19 Largest Private Schools in Howard County, MD
High Road Academy of Howard County
Special education school · Grades 5–12
51 students
Fulton, MD
B+Overall grade51 students7 students per teacher
#20 Largest Private Schools in Howard County, MD
The Mandala School
Religious school · Grades K–8
51 students
Columbia, MD
A-Overall grade51 students8 students per teacher
#21 Largest Private Schools in Howard County, MD
Linwood School
Special education school · Grades 3–12
50 students
Ellicott City, MD
A-Overall grade50 students6 students per teacher
#22 Largest Private Schools in Howard County, MD
The Julia Brown School
Montessori school · Grades Pre-K–3
49 students
Laurel, MD
B+Overall grade49 students16 students per teacher
#23 Largest Private Schools in Howard County, MD
Julia Brown School
Montessori school · Grades Pre-K–3
44 students
Columbia, MD
B+Overall grade44 students15 students per teacher
#24 Largest Private Schools in Howard County, MD
Children's Manor Montessori
Montessori school · Grades Pre-K–1
37 students
Ellicott City, MD
B+Overall grade37 students9 students per teacher
From official public records, updated October 2026.