This School is no longer MSHSAA Member School. School Colors & Logos Panthers Gold/Blue boys girls Social Media Principiaschoolathletics principiaschoolathletics Membership Full Member High School, Grades 9-12 St. Louis County Board District: #7 St. Louis Contact Information 13201 Clayton Rd St. Louis, MO 63131-1099 (314) 275-3580 Location 13201 Clayton Rd St. Louis, MO 63131-1099 (314) 275-3580 Get Directions