#1 Largest Private Schools in Winnebago County, WI
St. Mary Catholic Middle School
Diocesan school · Grades Pre-K–12
850 students
Neenah, WI
A+Overall grade850 students8 students per teacher
2026 lists
Largest Private Schools in Winnebago County, WI
The private schools in Winnebago County, WI with the most students. Top 16 of 16 schools.
#2 Largest Private Schools in Winnebago County, WI
Valley Christian School
Christian school (nondenominational) · Grades Pre-K–12
702 students
Oshkosh, WI
B-Overall grade702 students16 students per teacher
#3 Largest Private Schools in Winnebago County, WI
St. Mary Catholic High School
Diocesan school · Grades 9–12
272 students
Neenah, WI
A+Overall grade272 students11 students per teacher
#4 Largest Private Schools in Winnebago County, WI
Lourdes Academy Elementary School
Diocesan school · Grades Pre-K–4
235 students
Oshkosh, WI
BOverall grade235 students13 students per teacher
#5 Largest Private Schools in Winnebago County, WI
Lourdes Academy Middle School
Parish school · Grades 5–8
208 students
Oshkosh, WI
BOverall grade208 students13 students per teacher
#6 Largest Private Schools in Winnebago County, WI
New Hope Christian School
Lutheran (Missouri Synod) school · Grades Pre-K–8
200 students
Neenah, WI
B-Overall grade200 students15 students per teacher
#7 Largest Private Schools in Winnebago County, WI
Neenah Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
173 students
Neenah, WI
B+Overall grade173 students12 students per teacher
#8 Largest Private Schools in Winnebago County, WI
Neenah Lutheran School Adams St. Campus
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
173 students
Neenah, WI
BOverall grade173 students12 students per teacher
#9 Largest Private Schools in Winnebago County, WI
Lourdes Academy High School
Parish school · Grades 9–12
172 students
Oshkosh, WI
BOverall grade172 students13 students per teacher
#10 Largest Private Schools in Winnebago County, WI
Grace Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
163 students
Oshkosh, WI
BOverall grade163 students15 students per teacher
#11 Largest Private Schools in Winnebago County, WI
St. Gabriel Elementary School
Independent Catholic school · Grades Pre-K–5
131 students
Neenah, WI
BOverall grade131 students12 students per teacher
#12 Largest Private Schools in Winnebago County, WI
Martin Luther Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
115 students
Oshkosh, WI
AOverall grade115 students11 students per teacher
#13 Largest Private Schools in Winnebago County, WI
St. Mary Elementary School
Diocesan school · Grades Pre-K–5
79 students
Menasha, WI
AOverall grade79 students8 students per teacher
#14 Largest Private Schools in Winnebago County, WI
Wyldewood Christian School
Baptist school · Grades Pre-K–12
58 students
Oshkosh, WI
BOverall grade58 students14 students per teacher
#15 Largest Private Schools in Winnebago County, WI
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
48 students
Menasha, WI
A+Overall grade48 students6 students per teacher
#16 Largest Private Schools in Winnebago County, WI
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
44 students
Oshkosh, WI
A+Overall grade44 students8 students per teacher
From official public records, updated October 2026.