Home Postcode finder NSW Coolgardie Coolgardie postcode NSW Coolgardie is a locality in New South Wales covered by postcode 2478. Postcode 2478 State or territory New South Wales (NSW) Region NSW North Coast Add a free Coolgardie business listing Be the first listing in Coolgardie Common questionsWhat is the postcode for Coolgardie?Coolgardie, NSW has the postcode 2478.What state is Coolgardie in?Coolgardie is in New South Wales (NSW).Does postcode 2478 cover more than one suburb?Yes. Postcode 2478 covers 15 localities, so the postcode alone does not identify Coolgardie. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.