Home Postcode finder NSW Wagstaffe Wagstaffe postcode NSW Wagstaffe is a locality in New South Wales covered by postcode 2257. Postcode 2257 State or territory New South Wales (NSW) Region Gosford Add a free Wagstaffe business listing Be the first listing in Wagstaffe Common questionsWhat is the postcode for Wagstaffe?Wagstaffe, NSW has the postcode 2257.What state is Wagstaffe in?Wagstaffe is in New South Wales (NSW).Does postcode 2257 cover more than one suburb?Yes. Postcode 2257 covers 12 localities, so the postcode alone does not identify Wagstaffe. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.