| St. Mary Cathedral High School | |
| Streetaddress: | 321 North Otsego Avenue |
| City: | Gaylord |
| State: | Michigan |
| Zipcode: | 49735 |
| Country: | USA |
| Coordinates: | 45.0306°N -84.6775°W |
| Religion: | Roman Catholic |
| Oversight: | Diocese of Gaylord |
| Affiliation: | National Catholic Educational Association (NCEA) |
| Principal: | Jerry Belanger |
| Teaching Staff: | 18.8 (on a FTE basis) |
| Ratio: | 14.4 |
| Type: | Private, Coeducational |
| Grades: | PK–12 |
| Conference: | Ski Valley Conference |
| Nickname: | Snowbirds |
| Established: | 1925 |
| Enrollment: | 331, including 60 PK students |
| Enrollment As Of: | 2013-14 |
| Footnotes: | [1] |
St. Mary Cathedral High School is a private, Roman Catholic high school in Gaylord, Michigan. It is located in the Roman Catholic Diocese of Gaylord. As of 2019, the principal is Jerry Belanger.
St. Mary Cathedral School was established in 1894. A high school was added in 1925.
St. Mary's is a member of the Ski Valley Conference. The school colors are blue and white. The following MHSAA sanctioned sports are offered:[2]