Home Postcode finder NSW Gillenbah Gillenbah postcode NSW Gillenbah is a locality in New South Wales covered by postcode 2700. Postcode 2700 State or territory New South Wales (NSW) Region Canberra Add a free Gillenbah business listing Be the first listing in Gillenbah Common questionsWhat is the postcode for Gillenbah?Gillenbah, NSW has the postcode 2700.What state is Gillenbah in?Gillenbah is in New South Wales (NSW).Does postcode 2700 cover more than one suburb?Yes. Postcode 2700 covers 10 localities, so the postcode alone does not identify Gillenbah. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.