Home Postcode finder NSW Cadia Cadia postcode NSW Cadia is a locality in New South Wales covered by postcode 2800. Postcode 2800 State or territory New South Wales (NSW) Region NSW Country West Add a free Cadia business listing Be the first listing in Cadia Common questionsWhat is the postcode for Cadia?Cadia, NSW has the postcode 2800.What state is Cadia in?Cadia is in New South Wales (NSW).Does postcode 2800 cover more than one suburb?Yes. Postcode 2800 covers 33 localities, so the postcode alone does not identify Cadia. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.