#1 Best Private Schools in St. Louis County, MO
Rosati-Kain High School
Independent Catholic school · Grades 9–12
Smaller classes than 87% of Catholic schools in Missouri
Saint Louis, MO
A+Overall gradeAll girls127 students8 students per teacher
2026 lists
Best Private Schools in St. Louis County, MO
Private schools in St. Louis County, MO with the highest overall grades. Top 50 of 110 schools.
#2 Best Private Schools in St. Louis County, MO
Incarnate Word Academy
Independent Catholic school · Grades 9–12
100% of graduates go to four-year colleges
Saint Louis, MO
A+Overall gradeAll girls235 students9 students per teacher
#3 Best Private Schools in St. Louis County, MO
Villa Duchesne School
Independent Catholic school · Grades Pre-K–12
The smallest classes of any Catholic school in Saint Louis
Saint Louis, MO
A+Overall grade459 students4 students per teacher
#4 Best Private Schools in St. Louis County, MO
Crossroads College Preparatory School
Independent school · Grades 7–12
100% of graduates go to four-year colleges
Saint Louis, MO
A+Overall grade125 students6 students per teacher
#5 Best Private Schools in St. Louis County, MO
Thomas Jefferson School
Independent school · Grades 7–12
100% of graduates go to four-year colleges
Saint Louis, MO
A+Overall grade74 students4 students per teacher
#6 Best Private Schools in St. Louis County, MO
Micds
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in Missouri
Saint Louis, MO
A+Overall grade1,220 students9 students per teacher
#7 Best Private Schools in St. Louis County, MO
St. Louis Priory School
Independent Catholic school · Grades 7–12
100% of graduates go to four-year colleges
Saint Louis, MO
A+Overall gradeAll boys299 students8 students per teacher
#8 Best Private Schools in St. Louis County, MO
Al-Salam Day School
Islamic school · Grades K–12
One of the 3 largest private schools in Missouri
Manchester, MO
A+Overall grade278 students9 students per teacher
#9 Best Private Schools in St. Louis County, MO
The Freedom School
Presbyterian school · Grades Pre-K–8
Smaller classes than 62% of Christian schools in Missouri
Saint Louis, MO
A+Overall grade115 students10 students per teacher
#10 Best Private Schools in St. Louis County, MO
Christ the King Catholic School
Parish school · Grades Pre-K–8
Smaller classes than 73% of Catholic schools in Missouri
Saint Louis, MO
A+Overall grade186 students9 students per teacher
#11 Best Private Schools in St. Louis County, MO
Christian Academy of Greater St. Louis
Church of Christ school · Grades Pre-K–12
Smaller classes than 65% of Christian schools in Missouri
Saint Louis, MO
A+Overall grade103 students8 students per teacher
#12 Best Private Schools in St. Louis County, MO
Cor Jesu Academy
Independent Catholic school · Grades 9–12
100% of graduates go to four-year colleges
Saint Louis, MO
A+Overall gradeAll girls519 students11 students per teacher
#13 Best Private Schools in St. Louis County, MO
Tower Grove Christian Academy
Baptist school · Grades Pre-K–8
One of the most diverse private schools in Missouri
Saint Louis, MO
A+Overall grade101 students10 students per teacher
#14 Best Private Schools in St. Louis County, MO
Central Christian School
Presbyterian school · Grades Pre-K–6
Smaller classes than 69% of Christian schools in Missouri
Saint Louis, MO
A+Overall grade171 students9 students per teacher
#15 Best Private Schools in St. Louis County, MO
Principia School
Religious school · Grades Pre-K–12
The largest of 36 private schools in Missouri
Saint Louis, MO
A+Overall grade423 students8 students per teacher
#16 Best Private Schools in St. Louis County, MO
Rohan Woods School
Independent school · Grades Pre-K–6
The smallest classes of any independent school in Saint Louis
Saint Louis, MO
A+Overall grade68 students3 students per teacher
#17 Best Private Schools in St. Louis County, MO
St. Mary's South Side Catholic High School
Independent Catholic school · Grades 9–12
Smaller classes than 74% of Catholic schools in Missouri
Saint Louis, MO
A+Overall gradeAll boys203 students9 students per teacher
#18 Best Private Schools in St. Louis County, MO
The St. Michael School of Clayton
Episcopal school · Grades Pre-K–8
Smaller classes than 98% of Christian schools in Missouri
Saint Louis, MO
A+Overall grade71 students3 students per teacher
#19 Best Private Schools in St. Louis County, MO
St. Roch School
Parish school · Grades Pre-K–8
Serving families in Saint Louis since at least 2011
Saint Louis, MO
A+Overall grade130 students11 students per teacher
#20 Best Private Schools in St. Louis County, MO
Whitfield School
Independent school · Grades 6–12
98% of graduates go to four-year colleges
Saint Louis, MO
A+Overall grade407 students9 students per teacher
#21 Best Private Schools in St. Louis County, MO
Little Flower Catholic School
Parish school · Grades K–8
Smaller classes than 82% of Catholic schools in Missouri
Saint Louis, MO
A+Overall grade80 students8 students per teacher
#22 Best Private Schools in St. Louis County, MO
Salem Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Smaller classes than 76% of Christian schools in Missouri
Affton, MO
A+Overall grade84 students7 students per teacher
#23 Best Private Schools in St. Louis County, MO
Immanuel Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Serving families in Olivette since at least 2011
Olivette, MO
AOverall grade100 students11 students per teacher
#24 Best Private Schools in St. Louis County, MO
St. Louis University High School
Independent Catholic school · Grades 9–12
One of the 3 largest Catholic schools in Missouri
Saint Louis, MO
AOverall gradeAll boys1,036 students12 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.