Home Postcode finder NSW Big Hill Big Hill postcode NSW Big Hill is a locality in New South Wales covered by postcode 2579. Postcode 2579 State or territory New South Wales (NSW) Region Ingleburn Add a free Big Hill business listing Be the first listing in Big Hill Common questionsWhat is the postcode for Big Hill?Big Hill, NSW has the postcode 2579.What state is Big Hill in?Big Hill is in New South Wales (NSW).Does postcode 2579 cover more than one suburb?Yes. Postcode 2579 covers 7 localities, so the postcode alone does not identify Big Hill. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.