Home Postcode finder NSWDL St Marys East St Marys East postcode NSWDL St Marys East is a locality in New South Wales covered by postcode 2760. Postcode 2760 State or territory New South Wales (NSWDL) Region Nepean Add a free St Marys East business listing Be the first listing in St Marys East Common questionsWhat is the postcode for St Marys East?St Marys East, NSWDL has the postcode 2760.What state is St Marys East in?St Marys East is in New South Wales (NSWDL).Does postcode 2760 cover more than one suburb?Yes. Postcode 2760 covers 7 localities, so the postcode alone does not identify St Marys East. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.