#1 Best All-Boys 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
2026 lists
Best All-Boys Schools in St. Louis County, MO
The highest-graded schools of this kind in St. Louis County, MO. Top 7 of 7 schools.
#2 Best All-Boys 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
#3 Best All-Boys 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
#4 Best All-Boys Schools in St. Louis County, MO
Loyola Academy of St. Louis
Independent Catholic school · Grades 4–8
Smaller classes than 80% of Catholic schools in Missouri
Saint Louis, MO
AOverall gradeAll boys77 students8 students per teacher
#5 Best All-Boys Schools in St. Louis County, MO
St. John Vianney High School
Independent Catholic school · Grades 9–12
The only all-boys school in Kirkwood
Kirkwood, MO
A-Overall gradeAll boys581 students12 students per teacher
#6 Best All-Boys Schools in St. Louis County, 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
#7 Best All-Boys Schools in St. Louis County, MO
Missouri Torah Institute
Jewish day school · Grades 9–12
The only Jewish school in Chesterfield
Chesterfield, MO
BOverall gradeAll boys73 students7 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.