The St. Simon the Apostle campus is located on Mueller Road in South St. Louis County near the intersection of Lindbergh and Tesson Ferry.  The campus sits on 8.52 acres.  The St. Simon the Apostle campus consists of the parish rectory, Simon Says Preschool, and St. Simon the Apostle School.  The campus also has athletic fields, a gymnasium, batting cages, and a pavilion.