St. Michael the Archangel Catholic High School

St. Michael the Archangel Catholic High School (SMA) is a private, Roman Catholic, co-educational high school in Lee's Summit, Missouri, United States. It was established in 2017 and is part of the Roman Catholic Diocese of Kansas City–St. Joseph.

It is the first new high school built by the Diocese in over 50 years and replaced both St. Mary's and Archbishop O'Hara High Schools. It enrolls around 300 students.