Home Postcode finder NSW Kincumber South Kincumber South postcode NSW Kincumber South is a locality in New South Wales covered by postcode 2251. Postcode 2251 State or territory New South Wales (NSW) Region Gosford Add a free Kincumber South business listing Be the first listing in Kincumber South Common questionsWhat is the postcode for Kincumber South?Kincumber South, NSW has the postcode 2251.What state is Kincumber South in?Kincumber South is in New South Wales (NSW).Does postcode 2251 cover more than one suburb?Yes. Postcode 2251 covers 12 localities, so the postcode alone does not identify Kincumber South. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.