Pittwater High School, is a school located in Mona Vale, New South Wales, Australia, on Mona Street and Pittwater Road. It is a co-educational high school operated by the New South Wales Department of Education with students from years 7 to 12. The school was established in 1963.

Mona Vale is a suburb of Sydney, in the state of New South Wales, Australia. It is located 28 kilometres north of the Sydney central business district, in an area known as the Northern Beaches. Formerly the administrative centre of Pittwater Council, it is now located in the local government area of Northern Beaches Council. The traditional custodians of the area are the Garigal people. It is often colloquially referred to as "Mona".