#1 Largest Private Schools in Waukesha County, WI
Heritage Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
610 students
New Berlin, WI
BOverall grade610 students12 students per teacher
2026 lists
Largest Private Schools in Waukesha County, WI
The private schools in Waukesha County, WI with the most students. Top 49 of 49 schools.
#2 Largest Private Schools in Waukesha County, WI
Waukesha Catholic School
Parish school · Grades Pre-K–8
401 students
Waukesha, WI
B+Overall grade401 students12 students per teacher
#3 Largest Private Schools in Waukesha County, WI
St. Dominic Catholic School
Diocesan school · Grades Pre-K–8
355 students
Brookfield, WI
B-Overall grade355 students16 students per teacher
#4 Largest Private Schools in Waukesha County, WI
Lake Country Lutheran High School
Lutheran (Missouri Synod) school · Grades 9–12
352 students
Hartland, WI
B-Overall grade352 students18 students per teacher
#5 Largest Private Schools in Waukesha County, WI
Immanuel Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
344 students
Brookfield, WI
A-Overall grade344 students13 students per teacher
#6 Largest Private Schools in Waukesha County, WI
Christian Education Leadership Academ
Christian school (nondenominational) · Grades Pre-K–8
340 students
Pewaukee, WI
A-Overall grade340 students9 students per teacher
#7 Largest Private Schools in Waukesha County, WI
Divine Redeemer Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
338 students
Hartland, WI
BOverall grade338 students15 students per teacher
#8 Largest Private Schools in Waukesha County, WI
St. Mary Visitation School
Parish school · Grades Pre-K–8
290 students
Elm Grove, WI
B-Overall grade290 students14 students per teacher
#9 Largest Private Schools in Waukesha County, WI
St. Charles Parish School
Diocesan school · Grades Pre-K–8
274 students
Hartland, WI
B-Overall grade274 students13 students per teacher
#10 Largest Private Schools in Waukesha County, WI
Brookfield Christian School
Calvinist school · Grades Pre-K–8
266 students
Brookfield, WI
B+Overall grade266 students13 students per teacher
#11 Largest Private Schools in Waukesha County, WI
Bethlehem Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
265 students
Menomonee Falls, WI
B-Overall grade265 students20 students per teacher
#12 Largest Private Schools in Waukesha County, WI
St. Pauls Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
243 students
Muskego, WI
B-Overall grade243 students21 students per teacher
#13 Largest Private Schools in Waukesha County, WI
St. John Vianney School
Diocesan school · Grades Pre-K–8
234 students
Brookfield, WI
BOverall grade234 students12 students per teacher
#14 Largest Private Schools in Waukesha County, WI
Star of Bethlehem Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
220 students
New Berlin, WI
B-Overall grade220 students23 students per teacher
#15 Largest Private Schools in Waukesha County, WI
University Lake School
Independent school · Grades Pre-K–12
212 students
Hartland, WI
A+Overall grade212 students5 students per teacher
#16 Largest Private Schools in Waukesha County, WI
St. Matthew Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
205 students
Oconomowoc, WI
B-Overall grade205 students17 students per teacher
#17 Largest Private Schools in Waukesha County, WI
St. Matthews Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
205 students
Oconomowoc, WI
B-Overall grade205 students15 students per teacher
#18 Largest Private Schools in Waukesha County, WI
Grace Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
200 students
Menomonee Falls, WI
B-Overall grade200 students19 students per teacher
#19 Largest Private Schools in Waukesha County, WI
St. Anthony on the Lake School
Diocesan school · Grades Pre-K–8
182 students
Pewaukee, WI
BOverall grade182 students14 students per teacher
#20 Largest Private Schools in Waukesha County, WI
Mount Calvary Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
179 students
Waukesha, WI
BOverall grade179 students15 students per teacher
#21 Largest Private Schools in Waukesha County, WI
Prairie Hill Waldorf School
Independent school · Grades Pre-K–8
172 students
Pewaukee, WI
BOverall grade172 students12 students per teacher
#22 Largest Private Schools in Waukesha County, WI
Aquinas Academy
Independent Catholic school · Grades Pre-K–8
168 students
Menomonee Falls, WI
B+Overall grade168 students9 students per teacher
#23 Largest Private Schools in Waukesha County, WI
St. Agnes School
Diocesan school · Grades Pre-K–8
159 students
Butler, WI
A+Overall grade159 students12 students per teacher
#24 Largest Private Schools in Waukesha County, WI
St. John Lutheran School
Lutheran school · Grades K–8
137 students
Mukwonago, WI
B-Overall grade137 students15 students per teacher
From official public records, updated October 2026.