#1 Largest Private Schools in Upper Marlboro, MD
St. Mary of the Assumption School
Diocesan school · Grades Pre-K–8
230 students
Upper Marlboro, MD
BOverall grade230 students16 students per teacher
2026 lists
Largest Private Schools in Upper Marlboro, MD
The private schools in Upper Marlboro, MD with the most students. Top 5 of 5 schools.
#2 Largest Private Schools in Upper Marlboro, MD
Rock Creek Christian Academy
Baptist school · Grades Pre-K–12
182 students
Upper Marlboro, MD
BOverall grade182 students9 students per teacher
#3 Largest Private Schools in Upper Marlboro, MD
Fairhaven School
Religious school · Grades K–12
58 students
Upper Marlboro, MD
AOverall grade58 students15 students per teacher
#4 Largest Private Schools in Upper Marlboro, MD
Excellence Christian School
Baptist school · Grades Pre-K–5
27 students
Upper Marlboro, MD
AOverall grade27 students5 students per teacher
#5 Largest Private Schools in Upper Marlboro, MD
Fellowship Baptist Academy
Baptist school · Grades 1–12
21 students
Upper Marlboro, MD
AOverall grade21 students5 students per teacher
From official public records, updated October 2026.