St Luke’s Grammar School, situated in Dee Why on Sydney's Northern Beaches, is an Anglican co-educational school for students from Preschool through to Year 12. The School is a member school of The Sydney Anglican Schools Corporation.

The mission of St Luke’s Grammar School is to provide girls and boys with a high-quality education within a learning community based on Christian beliefs and practice, which will enable students to develop their individual abilities and contribute positively to the world in which they live.