Home Postcode finder NSW Cassilis Cassilis postcode NSW Cassilis is a locality in New South Wales covered by postcode 2329. Postcode 2329 State or territory New South Wales (NSW) Region Hunter Add a free Cassilis business listing More business listings in Cassilis Businesses in CassilisCassilis Public SchoolCoolah St · 02 63761009 Common questionsWhat is the postcode for Cassilis?Cassilis, NSW has the postcode 2329.What state is Cassilis in?Cassilis is in New South Wales (NSW).Does postcode 2329 cover more than one suburb?Yes. Postcode 2329 covers 3 localities, so the postcode alone does not identify Cassilis. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.