Mount St. Mary Catholic High School is located on a beautiful 28-acre campus. We are conveniently located one block east of South Western Avenue between SW 28th and SW 25th streets. MSM is only five minutes south of downtown Oklahoma City with convenient access from I-40, I-35, I-240, and I-44. 

Our address is 2801 S. Shartel Ave., Oklahoma City, OK 73109. 

Parking is available in the lot just north of the front entrance between SW 25th and SW 28th (just off Shartel Ave.) or in the gymnasium parking lot in the southwest corner of campus at SW 28th and Ollie.

Summer 2021 School Building Hours of Operation:

  • Monday - Thursday 8:00-Noon

  • Closed on Fridays

  • For the Fourth of July holiday, we will be closed on Monday, July 5th.