#1 Largest Private Schools in Milwaukee County, WI
Seton Catholic Schools
Independent Catholic school · Grades Pre-K–8
2,624 students
Saint Francis, WI
BOverall grade2,624 students15 students per teacher
2026 lists
Largest Private Schools in Milwaukee County, WI
The private schools in Milwaukee County, WI with the most students. Top 50 of 113 schools.
#2 Largest Private Schools in Milwaukee County, WI
St. Augustine Preparatory Academy
Christian school (nondenominational) · Grades Pre-K–12
1,759 students
Milwaukee, WI
B-Overall grade1,759 students15 students per teacher
#3 Largest Private Schools in Milwaukee County, WI
St. Anthony School
Parish school · Grades Pre-K–12
1,436 students
Milwaukee, WI
B-Overall grade1,436 students17 students per teacher
#4 Largest Private Schools in Milwaukee County, WI
Messmer Catholic Schools
Independent Catholic school · Grades Pre-K–12
1,180 students
Milwaukee, WI
B-Overall grade1,180 students14 students per teacher
#5 Largest Private Schools in Milwaukee County, WI
Messmer Catholic Schools
Independent Catholic school · Grades K–12
1,018 students
Milwaukee, WI
BOverall grade1,018 students13 students per teacher
#6 Largest Private Schools in Milwaukee County, WI
Salam School
Islamic school · Grades Pre-K–12
985 students
Milwaukee, WI
AOverall grade985 students9 students per teacher
#7 Largest Private Schools in Milwaukee County, WI
St. Marcus Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
956 students
Milwaukee, WI
B-Overall grade956 students18 students per teacher
#8 Largest Private Schools in Milwaukee County, WI
Milwaukee Lutheran High School
Lutheran (Missouri Synod) school · Grades 9–12
934 students
Milwaukee, WI
B-Overall grade934 students18 students per teacher
#9 Largest Private Schools in Milwaukee County, WI
Wisconsin Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
921 students
Milwaukee, WI
A-Overall grade921 students12 students per teacher
#10 Largest Private Schools in Milwaukee County, WI
Marquette University High School
Independent Catholic school · Grades 9–12
893 students
Milwaukee, WI
B+Overall gradeAll boys893 students15 students per teacher
#11 Largest Private Schools in Milwaukee County, WI
Shining Star Christian Schools
Christian school (nondenominational) · Grades Pre-K–9
777 students
Milwaukee, WI
B-Overall grade777 students27 students per teacher
#12 Largest Private Schools in Milwaukee County, WI
Martin Luther High School
Lutheran (ELCA) school · Grades 9–12
676 students
Greendale, WI
A+Overall grade676 students11 students per teacher
#13 Largest Private Schools in Milwaukee County, WI
Divine Savior Holy Angels High School
Independent Catholic school · Grades 9–12
633 students
Milwaukee, WI
A+Overall gradeAll girls633 students12 students per teacher
#14 Largest Private Schools in Milwaukee County, WI
Notre Dame School of Milwaukee
Independent Catholic school · Grades Pre-K–8
618 students
West Milwaukee, WI
B-Overall grade618 students16 students per teacher
#15 Largest Private Schools in Milwaukee County, WI
St. Thomas More High School
Diocesan school · Grades 9–12
566 students
Milwaukee, WI
B-Overall grade566 students15 students per teacher
#16 Largest Private Schools in Milwaukee County, WI
Hope Christian School: Fidelis
Christian school (nondenominational) · Grades Pre-K–8
551 students
Milwaukee, WI
B-Overall grade551 students31 students per teacher
#17 Largest Private Schools in Milwaukee County, WI
Greater Holy Temple Christian Academy
Church of God in Christ school · Grades Pre-K–8
500 students
Milwaukee, WI
B-Overall grade500 students25 students per teacher
#18 Largest Private Schools in Milwaukee County, WI
Hope Christian School-Semper
Christian school (nondenominational) · Grades Pre-K–8
497 students
Milwaukee, WI
B-Overall grade497 students25 students per teacher
#19 Largest Private Schools in Milwaukee County, WI
Hales Corners Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
476 students
Hales Corners, WI
BOverall grade476 students15 students per teacher
#20 Largest Private Schools in Milwaukee County, WI
Cristo Rey Jesuit Milwaukee High School
Independent Catholic school · Grades 9–12
464 students
Milwaukee, WI
B-Overall grade464 students16 students per teacher
#21 Largest Private Schools in Milwaukee County, WI
Cross Trainers Academy
Christian school (nondenominational) · Grades Pre-K–12
453 students
Milwaukee, WI
B-Overall grade453 students13 students per teacher
#22 Largest Private Schools in Milwaukee County, WI
Atlas Preparatory Academy High School
Independent school · Grades K–12
412 students
Milwaukee, WI
B-Overall grade412 students15 students per teacher
#23 Largest Private Schools in Milwaukee County, WI
St. Joseph Academy
Independent Catholic school · Grades Pre-K–8
389 students
Milwaukee, WI
B-Overall grade389 students15 students per teacher
#24 Largest Private Schools in Milwaukee County, WI
St. Adalbert Elementary School
Diocesan school · Grades K–8
385 students
Milwaukee, WI
B-Overall grade385 students17 students per teacher
From official public records, updated October 2026.