| St. Michael the Archangel Catholic High School | |
| Motto: | Know Truth, Love God, Serve Others |
| Address: | 2901 NW Lee's Summit Road |
| City: | Lee's Summit |
| State: | Missouri |
| Zipcode: | 64064 |
| Country: | United States |
| Other Name: | SMA |
| Former Names: | --> |
| Type: | Private high school |
| Religious Affiliation: | Roman Catholic |
| Founders: | --> |
| Oversight: | Roman Catholic Diocese of Kansas City–Saint Joseph |
| Principal: | Mary Kroening |
| Teaching Staff: | 27.5 |
| Grades: | 9–12 |
| Gender: | Co-educational |
| Enrollment: | 299 (2017-2018) |
| Ratio: | 10.9 |
| Colors: | Blue, green, white |
| Nickname: | Guardians |
| Accreditations: | --> |
| Affiliations: | --> |
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.[1]