St. Mary's University or St. Mary's College is the name of several universities:

• in Canada:
  • St. Mary's College, Calgary, Alberta
  • Saint Mary's University, Halifax, in Nova Scotia

• in the Philippines:
  • Saint Mary's University of Bayombong, Nueva Vizcaya

• in the United Kingdom:
  • Saint Mary's University College, Belfast, a college of Queen's University, Belfast, in Northern Ireland
  • St Mary's College, a college of the University of Durham in England
  • Saint Mary's College (Surrey), a college of the University of Surrey in England

• in Australia:
  • St Mary's College, Melbourne , a residential college of The University of Melbourne

• in the United States (by state):
  • Saint Mary's College of California, with regional centers at Moraga/Rheem, Oakland, Fairfield, San Joseand Sacramento, California
  • Saint Mary's College (Indiana) in Notre Dame, Indiana
  • St. Mary's College, Kansas in St. Marys, Kansas
  • Saint Mary's Seminary and University , in Baltimore, Maryland
  • St. Mary's College of Maryland, St. Mary's City, Maryland
  • Mount Saint Mary's College, Emmitsburg, Maryland
  • Saint Mary's College (Michigan), Orchard Lake, Michigan, defunct -- now known as Madonna University
  • Saint Mary's University of Minnesota with campuses in Winona, The Twin Cities, and Rochester
  • Saint Mary's University, Texas, in San Antonio, Texas
  • University of Saint Mary (Kansas) in Leavenworth, Kansas