Home Postcode finder NSW Goonumbla Goonumbla postcode NSW Goonumbla is a locality in New South Wales covered by postcode 2870. Postcode 2870 State or territory New South Wales (NSW) Region NSW Country West Add a free Goonumbla business listing Be the first listing in Goonumbla Common questionsWhat is the postcode for Goonumbla?Goonumbla, NSW has the postcode 2870.What state is Goonumbla in?Goonumbla is in New South Wales (NSW).Does postcode 2870 cover more than one suburb?Yes. Postcode 2870 covers 8 localities, so the postcode alone does not identify Goonumbla. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.