Home Postcode finder NSW Gongolgon Gongolgon postcode NSW Gongolgon is a locality in New South Wales covered by postcode 2839. Postcode 2839 State or territory New South Wales (NSW) Region NSW Country West Add a free Gongolgon business listing Be the first listing in Gongolgon Common questionsWhat is the postcode for Gongolgon?Gongolgon, NSW has the postcode 2839.What state is Gongolgon in?Gongolgon is in New South Wales (NSW).Does postcode 2839 cover more than one suburb?Yes. Postcode 2839 covers 7 localities, so the postcode alone does not identify Gongolgon. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.