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

Upcoming Events

  • Future Eaglet Football Game
    September 22, 2017
    6:00PM Cookout

    7:00PM Kickoff - Learn More

  • Parent-Teacher Conferences
    Thursday, Oct. 5
    All Students 1/2 Day
    1:00 p.m.-4:00 p.m. & 5:00 p.m.-7:00 p.m.
  • Teacher Appreciation Golf Outing
    • Monday, October 9, 2017
      Golf Shotgun at 9:00 am, luncheon to follow
    • Edgewood Country Club
      8399 Commerce Rd, Commerce Twp, MI 48382
    • Golf and luncheon $125
  • Fall Open House
    Sunday, October 29, 2017
    Mass 11 am; Tours noon-3 pm
    Request Information
  • 2017 Annual Auction
    Saturday, November 4, 2017
    5:30-11:30 PM
    St. Mary’s Athletic Complex (SMAC)


  • Spirit Week

    Dismissal times:

    1. Monday – Thursday:  2:00 dismissal
    2. Friday:  Dismissal following the completion of Field Day (+/- 11:00) - Learn More
  • Prep Building Construction Letter:

    We are pleased to inform you that the Orchard Lake Schools Board of Regents and the Prep Board of Trustees has approved an upgrade and modernization of the existing fifteen classrooms in the Prep Building and the construction of a new modern state of the art classroom building. Read More

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