Home Postcode finder NSW Chiswick Chiswick postcode NSW Chiswick is a locality in New South Wales covered by postcode 2046. Postcode 2046 State or territory New South Wales (NSW) Region Parramatta Add a free Chiswick business listing Be the first listing in Chiswick Common questionsWhat is the postcode for Chiswick?Chiswick, NSW has the postcode 2046.What state is Chiswick in?Chiswick is in New South Wales (NSW).Does postcode 2046 cover more than one suburb?Yes. Postcode 2046 covers 7 localities, so the postcode alone does not identify Chiswick. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.