About St. Mary's South Side Catholic High School
St. Mary's South Side Catholic High School is a Catholic college-preparatory high school for young men in south St. Louis, rooted in the Marianist tradition. Founded in 1931, it transitioned to a Marianist-sponsored independent school (adopting the South Side name) after the Archdiocese of St. Louis's 'All Things New' reorganization. The school highlights a small student-teacher ratio and a strong college-acceptance record.
Quick facts
- Founded 1931
- Grades 9–12, Private Catholic
- Marianists
- St. Louis
A Catholic education in St. Louis
Families choosing St. Mary's South Side Catholic High School are choosing more than academics — a Catholic school offers faith formation, the sacraments, service, and a close community. For Mass times, the nearest parish, and other Catholic schools in the area, use the free Catholic Connect map or browse all Catholic schools in St. Louis. For tuition, admissions, the calendar, and how to apply, visit the official website.
Find your parish and community in St. Louis
Join Catholic Connect free — find Catholic schools, parishes, and people near you.
Join Catholic Connect free