#1 Fastest-Growing Private Schools in St. Louis County, MO
Holy Cross Academy
Parish school · Grades Pre-K–8
Enrollment up 283% in about a decade
Saint Louis, MO
BOverall grade402 students13 students per teacher
2026 lists
Fastest-Growing Private Schools in St. Louis County, MO
Private schools in St. Louis County, MO whose enrollment has grown the most over the past decade. Top 25 of 25 schools.
#2 Fastest-Growing Private Schools in St. Louis County, MO
Torah Prep School - Boys Division
Jewish day school · Grades Pre-K–8
Enrollment up 227% in about a decade
Saint Louis, MO
B-Overall grade229 students12 students per teacher
#3 Fastest-Growing Private Schools in St. Louis County, MO
South City Community School
Christian school (nondenominational) · Grades Pre-K–8
Enrollment up 175% in about a decade
Saint Louis, MO
B-Overall grade184 students15 students per teacher
#4 Fastest-Growing Private Schools in St. Louis County, MO
Missouri Torah Institute
Jewish day school · Grades 9–12
Enrollment up 115% in about a decade
Chesterfield, MO
BOverall gradeAll boys73 students7 students per teacher
#5 Fastest-Growing Private Schools in St. Louis County, MO
Torah Prep School
Jewish day school · Grades Pre-K–8
Enrollment up 114% in about a decade
Saint Louis, MO
BOverall grade229 students10 students per teacher
#6 Fastest-Growing Private Schools in St. Louis County, MO
Villa Di Maria Montessori School
Montessori school · Grades Pre-K–6
Enrollment up 78% in about a decade
Kirkwood, MO
BOverall grade98 students14 students per teacher
#7 Fastest-Growing Private Schools in St. Louis County, MO
City Academy
Independent school · Grades Pre-K–6
Enrollment up 52% in about a decade
Saint Louis, MO
B+Overall grade182 students5 students per teacher
#8 Fastest-Growing Private Schools in St. Louis County, MO
The Freedom School
Presbyterian school · Grades Pre-K–8
Enrollment up 42% in about a decade
Saint Louis, MO
A+Overall grade115 students10 students per teacher
#9 Fastest-Growing Private Schools in St. Louis County, MO
Cardinal Ritter College Prep High School
Diocesan school · Grades 9–12
Enrollment up 41% in about a decade
Saint Louis, MO
BOverall grade453 students13 students per teacher
#10 Fastest-Growing Private Schools in St. Louis County, MO
St. Margaret of Scotland School
Parish school · Grades Pre-K–8
Enrollment up 31% in about a decade
Saint Louis, MO
B-Overall grade384 students18 students per teacher
#11 Fastest-Growing Private Schools in St. Louis County, MO
St. Gerard Majella Catholic School
Parish school · Grades Pre-K–8
Enrollment up 28% in about a decade
Kirkwood, MO
BOverall grade457 students14 students per teacher
#12 Fastest-Growing Private Schools in St. Louis County, MO
Al-Salam Day School
Islamic school · Grades K–12
Enrollment up 25% in about a decade
Manchester, MO
A+Overall grade278 students9 students per teacher
#13 Fastest-Growing Private Schools in St. Louis County, MO
Miriam School
Special education school · Ungraded
Enrollment up 18% in about a decade
Webster Groves, MO
B+Overall grade111 students10 students per teacher
#14 Fastest-Growing Private Schools in St. Louis County, MO
Christ Community Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Enrollment up 16% in about a decade
Kirkwood, MO
B-Overall grade447 students17 students per teacher
#15 Fastest-Growing Private Schools in St. Louis County, MO
Holy Spirit Catholic School
Parish school · Grades Pre-K–8
Enrollment up 16% in about a decade
Maryland Heights, MO
B+Overall grade174 students15 students per teacher
#16 Fastest-Growing Private Schools in St. Louis County, MO
Incarnate Word Parish School
Parish school · Grades K–8
Enrollment up 15% in about a decade
Chesterfield, MO
B-Overall grade448 students18 students per teacher
#17 Fastest-Growing Private Schools in St. Louis County, MO
St. Frances Cabrini Academy
Parish school · Grades K–8
Enrollment up 14% in about a decade
Saint Louis, MO
B+Overall grade185 students15 students per teacher
#18 Fastest-Growing Private Schools in St. Louis County, MO
St. Ann Catholic School
Parish school · Grades Pre-K–8
Enrollment up 14% in about a decade
Saint Louis, MO
B+Overall grade184 students13 students per teacher
#19 Fastest-Growing Private Schools in St. Louis County, MO
Loyola Academy of St. Louis
Independent Catholic school · Grades 4–8
Enrollment up 13% in about a decade
Saint Louis, MO
AOverall gradeAll boys77 students8 students per teacher
#20 Fastest-Growing Private Schools in St. Louis County, MO
Most Sacred Heart School
Diocesan school · Grades Pre-K–8
Enrollment up 12% in about a decade
Eureka, MO
B-Overall grade178 students15 students per teacher
#21 Fastest-Growing Private Schools in St. Louis County, MO
Word of Life Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Enrollment up 12% in about a decade
Saint Louis, MO
BOverall grade172 students16 students per teacher
#22 Fastest-Growing Private Schools in St. Louis County, MO
Chaminade College Preparatory School
Independent Catholic school · Grades 6–12
Enrollment up 11% in about a decade
Saint Louis, MO
B+Overall gradeAll boys872 students10 students per teacher
#23 Fastest-Growing Private Schools in St. Louis County, MO
St. Mary Magdalen School
Parish school · Grades Pre-K–8
Enrollment up 11% in about a decade
Brentwood, MO
B+Overall grade150 students12 students per teacher
#24 Fastest-Growing Private Schools in St. Louis County, MO
Sacred Heart Catholic School
Parish school · Grades Pre-K–8
Enrollment up 10% in about a decade
Florissant, MO
B-Overall grade363 students16 students per teacher
From official public records, updated October 2026.