#1 Largest Private Schools in Rock County, WI
Rock County Christian School
Christian school (nondenominational) · Grades K–12
240 students
Beloit, WI
B-Overall grade240 students13 students per teacher
2026 lists
Largest Private Schools in Rock County, WI
The private schools in Rock County, WI with the most students. Top 9 of 9 schools.
#2 Largest Private Schools in Rock County, WI
St. Pauls Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
171 students
Janesville, WI
BOverall grade171 students13 students per teacher
#3 Largest Private Schools in Rock County, WI
St. William Catholic School
Parish school · Grades Pre-K–8
167 students
Janesville, WI
BOverall grade167 students13 students per teacher
#4 Largest Private Schools in Rock County, WI
Our Lady of the Assumption School
Parish school · Grades Pre-K–8
112 students
Beloit, WI
A+Overall grade112 students9 students per teacher
#5 Largest Private Schools in Rock County, WI
Rock Prairie Montessori
Montessori school · Grades Pre-K–8
87 students
Janesville, WI
B+Overall grade87 students8 students per teacher
#6 Largest Private Schools in Rock County, WI
Oakhill Christian School
Christian school (nondenominational) · Grades K–12
84 students
Janesville, WI
B+Overall grade84 students7 students per teacher
#7 Largest Private Schools in Rock County, WI
St. Matthews Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
55 students
Janesville, WI
AOverall grade55 students10 students per teacher
#8 Largest Private Schools in Rock County, WI
Richardson School
Special education school · Grades 1–12
46 students
Beloit, WI
B+Overall grade46 students7 students per teacher
#9 Largest Private Schools in Rock County, WI
Dr. Kim F. Ehrhardt
Parish school · Grades Pre-K–5
24 students
Janesville, WI
AOverall grade24 students3 students per teacher
From official public records, updated October 2026.