Home Postcode finder NSW Gilgunnia Gilgunnia postcode NSW Gilgunnia is a locality in New South Wales covered by postcode 2835. Postcode 2835 State or territory New South Wales (NSW) Region NSW Country West Add a free Gilgunnia business listing Be the first listing in Gilgunnia Common questionsWhat is the postcode for Gilgunnia?Gilgunnia, NSW has the postcode 2835.What state is Gilgunnia in?Gilgunnia is in New South Wales (NSW).Does postcode 2835 cover more than one suburb?Yes. Postcode 2835 covers 12 localities, so the postcode alone does not identify Gilgunnia. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.