Important Dates


High School Nights:

St. Mary’s High School will participate in the following High School Nights. Three 20 minute presentations will address the school’s Marianist mission, curriculum, academic requirements, extra-curricular activities, athletics and other exciting St. Mary's High School news. St. Mary’s students and staff will be available for questions.

Tuesday, September 12, 2017

Ursuline Academy

Tuesday, September 19, 2017


Thursday, September 21, 2017


Thursday, September 28, 2017

St. Mary's

Thursday, October 5, 2017

Trinity Catholic

Open House:

Sunday, November 5, 2017
12:00-4:00 p.m.

We hope you will consider visiting St. Mary's High School for our annual Open House. We are excited for families to see what has been happening on our campus! From physical improvements in our main building to the continuous accolades our faculty keep receiving regarding their teaching, St. Mary’s just keeps getting better. If you have not visited us in a while, we believe it will be worth your time.

  • Tour the School and Athletic Fields
  • Meet with our Leadership Team, Teachers, Parents and Students
  • Enjoy Food and Drink
  • Participate in a 3 on 3 Tournament
  • Play a game of Washers, Ping Pong or Ultimate Frisbee

If you have any questions regarding Open House festivities, please contact the Admissions Director at 314-481-8400 ext. 110 or at

Important Dates 2017-2018:

 September 12 Ursuline Academy High School Night
 September 12 Shadowing Program Begins
 September 19 Rosati-Kain High School Night
 September 21 Vianney High School Night
 September 22 Dragon for a Day
 September 28 St. Mary's High School Night
 October 5 Trinity Catholic High School Night
 November 5 Open House 12:00-4:00 p.m.
 November 17 Applications Due (Catholic School Students Only)
 January 10 Applicant Interviews
 February 2 Acceptance Letters Mailed
 March 10 Placement Test TENTATIVE
 March 15 Incoming Freshmen Registration TENTATIVE
 April 15 Incoming Freshmen Mass & Breakfast
 May Notification of Tuition Assistance Awards

A Marianist Education

Catholic High School serving young men in the Marianist tradition.

Characteristics of Marianist Education (CME):

  • Educate for formation in faith
  • Provide an integral, quality education
  • Educate in family spirit
  • Educate for service, justice and peace
  • Educate for adaptation and change

Become A Dragon

To arrange a visit or to receive more information about St. Mary's High School, please complete the Online Inquiry.

Take the first steps to become a dragon!

Why St. Mary's?

“My experiences at St. Mary’s have been incomparable. No other school has a closer community than here. Everyone knows everyone’s name. Even the teachers know every student and how each one of us learns. It is this close attention and family atmosphere that have helped me to achieve all that I have during my four years here. I can look back at each step in the National Merit process and recall how Mrs. Klimpel proofread an essay or Dr. Muentnich helped me pick a college major. Everyone here is connected, and I am confident these connections will last throughout college and the rest of my life. The opportunities at St. Mary’s are immeasurable.”  - Tony Puricelli, National Merit Finalist and Valedictorian of the Class of 2010

"...this place is like no other. My son is flourishing and is so happy here. What happens here is so simple, yet so profound. My son is standing tall and growing into a young man. The care and understanding he has received here is remarkable.  I could not be any happier."  - Dana Kramer, Parent of Alex, Class of 2014