Home Postcode finder NSW Little Jilliby Little Jilliby postcode NSW Little Jilliby is a locality in New South Wales covered by postcode 2259. Postcode 2259 State or territory New South Wales (NSW) Region Gosford Add a free Little Jilliby business listing Be the first listing in Little Jilliby Common questionsWhat is the postcode for Little Jilliby?Little Jilliby, NSW has the postcode 2259.What state is Little Jilliby in?Little Jilliby is in New South Wales (NSW).Does postcode 2259 cover more than one suburb?Yes. Postcode 2259 covers 42 localities, so the postcode alone does not identify Little Jilliby. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.