Home Postcode finder NSW Wondabyne Wondabyne postcode NSW Wondabyne is a locality in New South Wales covered by postcode 2256. Postcode 2256 State or territory New South Wales (NSW) Region Gosford Add a free Wondabyne business listing Be the first listing in Wondabyne Common questionsWhat is the postcode for Wondabyne?Wondabyne, NSW has the postcode 2256.What state is Wondabyne in?Wondabyne is in New South Wales (NSW).Does postcode 2256 cover more than one suburb?Yes. Postcode 2256 covers 10 localities, so the postcode alone does not identify Wondabyne. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.