Home Postcode finder NSW Windsor Downs Windsor Downs postcode NSW Windsor Downs is a locality in New South Wales covered by postcode 2756. Postcode 2756 State or territory New South Wales (NSW) Region Nepean Add a free Windsor Downs business listing Be the first listing in Windsor Downs Common questionsWhat is the postcode for Windsor Downs?Windsor Downs, NSW has the postcode 2756.What state is Windsor Downs in?Windsor Downs is in New South Wales (NSW).Does postcode 2756 cover more than one suburb?Yes. Postcode 2756 covers 28 localities, so the postcode alone does not identify Windsor Downs. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.