Home Postcode finder NSW Gumbalie Gumbalie postcode NSW Gumbalie is a locality in New South Wales covered by postcode 2840. Postcode 2840 State or territory New South Wales (NSW) Region NSW Country West Add a free Gumbalie business listing Be the first listing in Gumbalie Common questionsWhat is the postcode for Gumbalie?Gumbalie, NSW has the postcode 2840.What state is Gumbalie in?Gumbalie is in New South Wales (NSW).Does postcode 2840 cover more than one suburb?Yes. Postcode 2840 covers 11 localities, so the postcode alone does not identify Gumbalie. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.