St. Mary's South Side Catholic High School
Independent Catholic school · Grades 9–12
Saint Louis, MO
4701 S Grand Blvd, Saint Louis, MO 63111
Overall grade: A+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- AClass size
- BCollege-going
- A-Years serving families
- ADiversity
What stands out
- Smaller classes than 74% of Catholic schools in Missouri
- Serving families in Saint Louis since at least 2011
St. Mary's South Side Catholic High School is an independent Catholic school in Saint Louis, Missouri, for students from 9th grade through 12th grade. It has about 203 students and around 9 students per teacher, smaller classes than 74% of Catholic high schools in Missouri. It has been listed in official private school records since 2011–12. The school is an all-boys school and is part of the Archdiocese of St. Louis. Students attend about 7 hours a day, 176 days a year. Missouri has programs that can help pay tuition; ask the school whether it takes part.
At a glance
- Grades
- Grades 9–12
- Students
- 203
- Teachers
- 22.6 (full-time equivalent)
- Students per teacher
- 9
- Boys and girls
- All boys
- Religious affiliation
- Catholic · Independent Catholic school
- Diocese
- Archdiocese of St. Louis
- School day
- About 7 hours
- School year
- 176 days
- Graduates going to 4-year colleges
- About 46% (the school's estimate for the class before the survey)
Reviews
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How it compares
- Smaller classes than 74% of Catholic high schools in Missouri (9 students per teacher).
- A smaller school: fewer students than 78% of Catholic high schools in Missouri.
- Compared with 23 Catholic high schools in Missouri.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Catholic Educational Association
Help paying tuition in Missouri
These state programs can help pay private school tuition. Only participating schools can accept them, so ask St. Mary's South Side Catholic High School whether it takes part.
- MOScholars · Tax-credit scholarship
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about St. Mary's South Side Catholic High School
What grades does St. Mary's South Side Catholic High School serve?
St. Mary's South Side Catholic High School serves grades 9–12.
How many students attend St. Mary's South Side Catholic High School?
About 203 students, with 9 students per teacher, according to official records.
How much is tuition at St. Mary's South Side Catholic High School?
Call the school to ask about tuition, financial aid and payment plans. Missouri has programs that can help pay private school tuition; ask whether the school takes part.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
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