Home Postcode finder NSW Wongarbon Wongarbon postcode NSW Wongarbon is a locality in New South Wales covered by postcode 2831. Postcode 2831 State or territory New South Wales (NSW) Region NSW Country West Add a free Wongarbon business listing More business listings in Wongarbon Businesses in WongarbonWongarbon Public School28 Railway St · 02 68878242 Common questionsWhat is the postcode for Wongarbon?Wongarbon, NSW has the postcode 2831.What state is Wongarbon in?Wongarbon is in New South Wales (NSW).Does postcode 2831 cover more than one suburb?Yes. Postcode 2831 covers 23 localities, so the postcode alone does not identify Wongarbon. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.