This School is no longer MSHSAA Member School. School Colors & Logos Crusaders and Lady Crusaders Blue/White boys girls Social Media sdhsathletics Membership Full Member High School, Grades 9-12 St. Charles County Board District: #7 St. Louis Contact Information 31 St Dominic Dr O'fallon, MO 63366-2395 (636) 240-8303 (636) 240-9884 fax Location 31 St Dominic Dr O'fallon, MO 63366-2395 (636) 240-8303 Get Directions