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.

The school was founded and officially opened on 25 September 2006.

[1] Located within the Diocese of Port Harcourt, the school is run by the Sisters of the Immaculate Heart of Mary, Mother of Christ.

John Dumale while the school principal is Rev.