#1 Fastest-Growing Private Schools in Jefferson County, WI
St. John's Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Enrollment up 72% in about a decade
Watertown, WI
B+Overall grade143 students13 students per teacher
2026 lists
Fastest-Growing Private Schools in Jefferson County, WI
Private schools in Jefferson County, WI whose enrollment has grown the most over the past decade. Top 9 of 9 schools.
#2 Fastest-Growing Private Schools in Jefferson County, WI
Lakeside Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
Enrollment up 49% in about a decade
Lake Mills, WI
B-Overall grade535 students14 students per teacher
#3 Fastest-Growing Private Schools in Jefferson County, WI
Calvary Baptist Christian School
Baptist school · Grades Pre-K–8
Enrollment up 43% in about a decade
Watertown, WI
A+Overall grade152 students11 students per teacher
#4 Fastest-Growing Private Schools in Jefferson County, WI
Good Shepherd Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Enrollment up 35% in about a decade
Watertown, WI
B+Overall grade135 students15 students per teacher
#5 Fastest-Growing Private Schools in Jefferson County, WI
Trinity-St. Lukes Lutheran Elementary School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Enrollment up 29% in about a decade
Watertown, WI
AOverall grade123 students10 students per teacher
#6 Fastest-Growing Private Schools in Jefferson County, WI
St. John Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Enrollment up 16% in about a decade
Waterloo, WI
AOverall grade72 students10 students per teacher
#7 Fastest-Growing Private Schools in Jefferson County, WI
St. Peters Ev. Lutheran
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Enrollment up 15% in about a decade
Helenville, WI
B+Overall grade55 students12 students per teacher
#8 Fastest-Growing Private Schools in Jefferson County, WI
St. Paul Evangelical Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
Enrollment up 13% in about a decade
Lake Mills, WI
B-Overall grade203 students17 students per teacher
#9 Fastest-Growing Private Schools in Jefferson County, WI
Trinity St. Lukes Lutheran Middle School
Lutheran (Wisconsin Synod) school · Grades 3–8
Enrollment up 10% in about a decade
Watertown, WI
B+Overall grade88 students13 students per teacher
From official public records, updated October 2026.