#1 Best Private High Schools in Saint Louis, 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 High Schools in Saint Louis, MO
Private high schools in Saint Louis, MO with the highest overall grades. Top 21 of 21 schools.
#2 Best Private High Schools in Saint Louis, 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 High Schools in Saint Louis, 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 High Schools in Saint Louis, 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 High Schools in Saint Louis, 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
#6 Best Private High Schools in Saint Louis, 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
#7 Best Private High Schools in Saint Louis, 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
#8 Best Private High Schools in Saint Louis, 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
#9 Best Private High Schools in Saint Louis, 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
#10 Best Private High Schools in Saint Louis, 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
#11 Best Private High Schools in Saint Louis, 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
#12 Best Private High Schools in Saint Louis, MO
Visitation Academy
Independent Catholic school · Grades Pre-K–12
100% of graduates go to four-year colleges
Saint Louis, MO
AOverall gradeAll girls555 students9 students per teacher
#13 Best Private High Schools in Saint Louis, MO
Ursuline Academy
Independent Catholic school · Grades 9–12
96% of graduates go to four-year colleges
Saint Louis, MO
B+Overall gradeAll girls363 students12 students per teacher
#14 Best Private High Schools in Saint Louis, MO
Chaminade College Preparatory School
Independent Catholic school · Grades 6–12
96% of graduates go to four-year colleges
Saint Louis, MO
B+Overall gradeAll boys872 students10 students per teacher
#15 Best Private High Schools in Saint Louis, MO
St. Joseph's Academy
Independent Catholic school · Grades 9–12
100% of graduates go to four-year colleges
Saint Louis, MO
BOverall gradeAll girls587 students12 students per teacher
#16 Best Private High Schools in Saint Louis, MO
Lutheran High School South
Lutheran (Missouri Synod) school · Grades 9–12
The largest Christian school in Saint Louis
Saint Louis, MO
BOverall grade550 students13 students per teacher
#17 Best Private High Schools in Saint Louis, MO
Villa Duchesne Upper and Lower School
Independent Catholic school · Grades Pre-K–12
100% of graduates go to four-year colleges
Saint Louis, MO
BOverall grade465 students9 students per teacher
#18 Best Private High Schools in Saint Louis, MO
Greenways Academy
Alternative school · Grades 1–12
The largest of 44 independent schools in Missouri
Saint Louis, MO
BOverall grade3,015 students
#19 Best Private High Schools in Saint Louis, MO
Cardinal Ritter College Prep High School
Diocesan school · Grades 9–12
100% of graduates go to four-year colleges
Saint Louis, MO
BOverall grade453 students13 students per teacher
#20 Best Private High Schools in Saint Louis, MO
TDW Academy
Christian school (nondenominational) · Grades 9–12
90% of graduates go to four-year colleges
Saint Louis, MO
B-Overall grade84 students21 students per teacher
#21 Best Private High Schools in Saint Louis, MO
Lutheran High School North
Lutheran (Missouri Synod) school · Grades 6–12
90% of graduates go to four-year colleges
Saint Louis, MO
B-Overall grade335 students13 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.