#1 Fastest-Growing Private Schools in Williamson County, TX
Sapientia Montessori School
Montessori school · Grades Pre-K–5
Enrollment up 119% in about a decade
Cedar Park, TX
AOverall grade68 students6 students per teacher
2026 lists
Fastest-Growing Private Schools in Williamson County, TX
Private schools in Williamson County, TX whose enrollment has grown the most over the past decade. Top 7 of 7 schools.
#2 Fastest-Growing Private Schools in Williamson County, TX
Grace Academy of Georgetown
Christian school (nondenominational) · Grades K–12
Enrollment up 109% in about a decade
Georgetown, TX
B-Overall grade353 students12 students per teacher
#3 Fastest-Growing Private Schools in Williamson County, TX
Community Montessori School
Montessori school · Grades Pre-K–8
Enrollment up 55% in about a decade
Georgetown, TX
B+Overall grade118 students30 students per teacher
#4 Fastest-Growing Private Schools in Williamson County, TX
Round Rock Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
Enrollment up 52% in about a decade
Round Rock, TX
B+Overall grade670 students12 students per teacher
#5 Fastest-Growing Private Schools in Williamson County, TX
St. Dominic Savio Catholic High School
Diocesan school · Grades 9–12
Enrollment up 48% in about a decade
Austin, TX
AOverall grade414 students13 students per teacher
#6 Fastest-Growing Private Schools in Williamson County, TX
Holy Family Catholic School
Diocesan school · Grades Pre-K–8
Enrollment up 32% in about a decade
Austin, TX
B+Overall grade587 students23 students per teacher
#7 Fastest-Growing Private Schools in Williamson County, TX
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Enrollment up 22% in about a decade
Georgetown, TX
BOverall grade205 students10 students per teacher
From official public records, updated October 2026.