Home Postcode finder NSW Medway Medway postcode NSW Medway is a locality in New South Wales covered by postcode 2577. Postcode 2577 State or territory New South Wales (NSW) Region Ingleburn Add a free Medway business listing Be the first listing in Medway Common questionsWhat is the postcode for Medway?Medway, NSW has the postcode 2577.What state is Medway in?Medway is in New South Wales (NSW).Does postcode 2577 cover more than one suburb?Yes. Postcode 2577 covers 30 localities, so the postcode alone does not identify Medway. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.