Home Postcode finder NSW Jilliby Jilliby postcode NSW 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 Jilliby business listing More business listings in Jilliby Businesses in JillibyAdaz Electricals48 · 1300280119 Common questionsWhat is the postcode for Jilliby?Jilliby, NSW has the postcode 2259.What state is Jilliby in?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 Jilliby. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.