St. Mary's Preparatory Catholic High School OLS The Polish Mission SSCMS
Welcome to St. Mary's Catholic and Boarding High School

St. Mary's Preparatory - A Catholic, College Prep, All-Boys High School for Day and Boarding Students

St. Mary's Preparatory is a four year secondary program of pre-college studies in a disciplined environment preparing young men for future study and careers of service. The Prep has a day student and boarding school program. St. Mary's is accredited by the State of Michigan Board of Education, the Archdiocese of Detroit, and MNSAA/MANS. Almost 100% of our graduates attend college. "If the Orchard Lake Schools did not exist, it would be necessary to establish them." -- Pope John Paul II

2017-2018 St. Mary's Prep Latest News

  • 2017-2018 St. Mary's Prep Video Learn More
    2017-2018 St. Mary's Prep Video

  • OLSM's football game has been named the CHSL Game of the Week! Learn More
    OLSM's week five football game vs. DLS has been named the CHSL Game of the Week on FM 101.5 and AM 1400 the Patriot. In addition to being heard on-the-air it can be streamed on We are also on TuneIn, I Heart Radio, and have our own Patriot mobile app. Pregame coverage starts at 6:30 PM with the kickoff at 7.