Sunderland High School was a mixed private day school located in Sunderland, Tyne and Wear, England. Founded in 1883 as the oldest girls' senior school in Sunderland, it merged with a local boys' school to become the current coeducational school. A junior school was later added and is located on a separate site nearby. It is owned by the United Church Schools Trust. The school closed at the end of the 2016 Summer term.