#1 Largest Private Schools in Washington County, WI
Kettle Moraine Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
568 students
Jackson, WI
B-Overall grade568 students13 students per teacher
2026 lists
Largest Private Schools in Washington County, WI
The private schools in Washington County, WI with the most students. Top 16 of 16 schools.
#2 Largest Private Schools in Washington County, WI
St. John's Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
261 students
West Bend, WI
BOverall grade261 students15 students per teacher
#3 Largest Private Schools in Washington County, WI
Peace Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
247 students
Hartford, WI
BOverall grade247 students17 students per teacher
#4 Largest Private Schools in Washington County, WI
Holy Angels School
Diocesan school · Grades Pre-K–8
212 students
West Bend, WI
B-Overall grade212 students15 students per teacher
#5 Largest Private Schools in Washington County, WI
St. Frances Cabrini School
Diocesan school · Grades Pre-K–8
169 students
West Bend, WI
B-Overall grade169 students14 students per teacher
#6 Largest Private Schools in Washington County, WI
Morning Star Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
166 students
Jackson, WI
B-Overall grade166 students18 students per teacher
#7 Largest Private Schools in Washington County, WI
St. Gabriel Catholic Parish
Diocesan school · Grades Pre-K–8
120 students
Hubertus, WI
BOverall grade120 students10 students per teacher
#8 Largest Private Schools in Washington County, WI
Holy Trinity Catholic School
Diocesan school · Grades Pre-K–8
105 students
Kewaskum, WI
A-Overall grade105 students9 students per teacher
#9 Largest Private Schools in Washington County, WI
Ozaukee Christian School
Christian school (nondenominational) · Grades Pre-K–8
97 students
West Bend, WI
AOverall grade97 students12 students per teacher
#10 Largest Private Schools in Washington County, WI
Crown of Life Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
88 students
Hubertus, WI
A-Overall grade88 students11 students per teacher
#11 Largest Private Schools in Washington County, WI
St. Johns Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
84 students
Newburg, WI
A-Overall grade84 students11 students per teacher
#12 Largest Private Schools in Washington County, WI
St. Augustine School
Independent Catholic school · Grades Pre-K–12
66 students
Colgate, WI
B+Overall grade66 students10 students per teacher
#13 Largest Private Schools in Washington County, WI
St. Peter Catholic School
Parish school · Grades Pre-K–5
59 students
Slinger, WI
AOverall grade59 students6 students per teacher
#14 Largest Private Schools in Washington County, WI
Trinity Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
56 students
West Bend, WI
AOverall grade56 students8 students per teacher
#15 Largest Private Schools in Washington County, WI
St. Kilian School
Parish school · Grades Pre-K–8
46 students
Hartford, WI
A+Overall grade46 students7 students per teacher
#16 Largest Private Schools in Washington County, WI
St. Lucas Grade School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
41 students
Kewaskum, WI
AOverall grade41 students10 students per teacher
From official public records, updated October 2026.