St Paul's Grammar School is an independent, non-denominational Christian, co-educational early learning, primary and secondary day school. The school was founded in 1983 in Cranebrook, an outer western suburb of Sydney, New South Wales, Australia. St. Paul's Grammar School has approximately 860 students, from early learning through kindergarten to year 12.

The school is a member of the Independent Schools Association, the Australian Heads of Independent Schools Association, and HICES.