| St. Mary's Catholic Model High School | |
| Motto: | "Faith, Knowledge and Love" |
| Motto Translation: | Latin: Fides, Notitia et Amor |
| Patron: | Mary, mother of Jesus |
| Type: | Independent, Co-educational, Day and Boarding |
| Chaplain: | Rev. Fr. John Dumale |
| Principal: | Rev. Sr. Mary Breda Chilaka |
| Religion: | Roman Catholic |
| District: | Diocese of Port Harcourt |
| Street: | 33 Harbour Road |
| City: | Port Harcourt |
| State: | Rivers State |
| Country: | Nigeria |
| Coordinates: | 4.7636°N 7.0125°W |
St. Mary's Catholic Model High School is an independent, co-educational, Catholic, day and boarding school, located in Port Harcourt, Rivers State, Nigeria. As its name indicates, its patron saint is Mary, mother of Jesus. Its motto is "Faith, Knowledge and Love". The school was founded and officially opened on 25 September 2006. The proprietor is His Lordship, Most Rev. Camillus Archibong Etokudoh.[1]
Located within the Diocese of Port Harcourt, the school is run by the Sisters of the Immaculate Heart of Mary, Mother of Christ. The sixth and current chaplain is Rev. Fr. John Dumale while the school principal is Rev. Sr. Mary Breda Chilaka.[1]
Former chaplains of the school include: