#1 Largest Private Schools in Jefferson County, WI
Lakeside Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
535 students
Lake Mills, WI
B-Overall grade535 students14 students per teacher
2026 lists
Largest Private Schools in Jefferson County, WI
The private schools in Jefferson County, WI with the most students. Top 20 of 20 schools.
#2 Largest Private Schools in Jefferson County, WI
Luther Preparatory School
Lutheran (Wisconsin Synod) school · Grades 9–12
409 students
Watertown, WI
AOverall grade409 students9 students per teacher
#3 Largest Private Schools in Jefferson County, WI
St. Paul Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
203 students
Lake Mills, WI
B-Overall grade203 students17 students per teacher
#4 Largest Private Schools in Jefferson County, WI
St. Marks Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
191 students
Watertown, WI
BOverall grade191 students16 students per teacher
#5 Largest Private Schools in Jefferson County, WI
Crown of Life Christian Academy
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
183 students
Fort Atkinson, WI
B-Overall grade183 students14 students per teacher
#6 Largest Private Schools in Jefferson County, WI
Calvary Baptist Christian School
Baptist school · Grades Pre-K–8
152 students
Watertown, WI
A+Overall grade152 students11 students per teacher
#7 Largest Private Schools in Jefferson County, WI
St. John's Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
143 students
Watertown, WI
B+Overall grade143 students13 students per teacher
#8 Largest Private Schools in Jefferson County, WI
Good Shepherd Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
135 students
Watertown, WI
B+Overall grade135 students15 students per teacher
#9 Largest Private Schools in Jefferson County, WI
Trinity-St. Lukes Lutheran Elementary School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
123 students
Watertown, WI
AOverall grade123 students10 students per teacher
#10 Largest Private Schools in Jefferson County, WI
St. Joseph School
Diocesan school · Grades K–8
105 students
Fort Atkinson, WI
AOverall grade105 students8 students per teacher
#11 Largest Private Schools in Jefferson County, WI
St. Henry Catholic School
Parish school · Grades 1–8
102 students
Watertown, WI
A+Overall grade102 students9 students per teacher
#12 Largest Private Schools in Jefferson County, WI
St. Paul's Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
89 students
Fort Atkinson, WI
A-Overall grade89 students13 students per teacher
#13 Largest Private Schools in Jefferson County, WI
Trinity St. Lukes Lutheran Middle School
Lutheran (Wisconsin Synod) school · Grades 3–8
88 students
Watertown, WI
B+Overall grade88 students13 students per teacher
#14 Largest Private Schools in Jefferson County, WI
St. John the Baptist Catholic School
Parish school · Grades Pre-K–8
82 students
Jefferson, WI
A+Overall grade82 students8 students per teacher
#15 Largest Private Schools in Jefferson County, WI
St. Johns Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
76 students
Jefferson, WI
B+Overall grade76 students14 students per teacher
#16 Largest Private Schools in Jefferson County, WI
St. John Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
72 students
Waterloo, WI
AOverall grade72 students10 students per teacher
#17 Largest Private Schools in Jefferson County, WI
Maranatha Baptist Academy
Baptist school · Grades 9–12
65 students
Watertown, WI
A-Overall grade65 students9 students per teacher
#18 Largest Private Schools in Jefferson County, WI
St. Peters Ev. Lutheran
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
55 students
Helenville, WI
B+Overall grade55 students12 students per teacher
#19 Largest Private Schools in Jefferson County, WI
St. Pauls Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
52 students
Ixonia, WI
A-Overall grade52 students11 students per teacher
#20 Largest Private Schools in Jefferson County, WI
Holy Family School
Parish school · Grades Pre-K–7
23 students
Waterloo, WI
AOverall grade23 students6 students per teacher
From official public records, updated October 2026.