#1 Largest Private Schools in Olney, MD
Our Lady of Good Counsel High School
Independent Catholic school · Grades 9–12
1,246 students
Olney, MD
A+Overall grade1,246 students12 students per teacher
2026 lists
Largest Private Schools in Olney, MD
The private schools in Olney, MD with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Olney, MD
St. Peter's School
Parish school · Grades Pre-K–8
431 students
Olney, MD
A+Overall grade431 students10 students per teacher
#3 Largest Private Schools in Olney, MD
Washington Christian Academy
Christian school (nondenominational) · Grades K–12
289 students
Olney, MD
A+Overall grade289 students10 students per teacher
#4 Largest Private Schools in Olney, MD
St. John's Episcopal School
Episcopal school · Grades Pre-K–8
154 students
Olney, MD
A+Overall grade154 students9 students per teacher
#5 Largest Private Schools in Olney, MD
Olney Adventist Preparatory
Seventh-day Adventist school · Grades K–8
93 students
Olney, MD
AOverall grade93 students10 students per teacher
#6 Largest Private Schools in Olney, MD
Olney Adventist Preparatory School
Seventh-day Adventist school · Grades K–8
92 students
Olney, MD
B+Overall grade92 students10 students per teacher
From official public records, updated October 2026.