St Mary's Grammar School
| St. Mary's Grammar School | |
|---|---|
| Location | |
| Coordinates | 54°45′25″N 6°36′04″W / 54.757°N 6.601°W |
| Information | |
| Type | Grammar School |
| Motto | Gloria Deo Soli (Glory to God Alone) |
| Religious affiliation | Roman Catholic |
| Established | 1927 |
| Local authority | Education Authority (North Eastern) |
| Principal | Paul McClean |
| Gender | Coeducational |
| Age | 11 to 18 |
| Enrolment | 1,099 (approx) |
| Colours | |
| Website | stmarysmagherafelt |
St. Mary's Grammar School is a grammar school in Magherafelt, County Londonderry, Northern Ireland.