St Gregory's College Campbelltown (abbreviated as SGC or Greg's or St Greg's) is an independent Roman Catholic single-sex and co-educational comprehensive and specialist primary and secondary day and boarding school, located in Gregory Hills, near Campbelltown, a south-western suburb of Sydney, New South Wales, Australia. With specialist expertise as an agricultural school, St Gregory's College provides a co-educational environment for students in the Year K to Year 6 primary school; and a boys-only environment for students in the Year 7 to Year 12 secondary schools.