Home Postcode finder NSW Blackbutt Blackbutt postcode NSW Blackbutt is a locality in New South Wales covered by postcode 2529. Postcode 2529 State or territory New South Wales (NSW) Region Illawarra Add a free Blackbutt business listing Be the first listing in Blackbutt Common questionsWhat is the postcode for Blackbutt?Blackbutt, NSW has the postcode 2529.What state is Blackbutt in?Blackbutt is in New South Wales (NSW).Does postcode 2529 cover more than one suburb?Yes. Postcode 2529 covers 7 localities, so the postcode alone does not identify Blackbutt. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.