Home Postcode finder NSW Howick Howick postcode NSW Howick is a locality in New South Wales covered by postcode 2330. Postcode 2330 State or territory New South Wales (NSW) Region Hunter Add a free Howick business listing Be the first listing in Howick Common questionsWhat is the postcode for Howick?Howick, NSW has the postcode 2330.What state is Howick in?Howick is in New South Wales (NSW).Does postcode 2330 cover more than one suburb?Yes. Postcode 2330 covers 63 localities, so the postcode alone does not identify Howick. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.