Home Postcode finder NSW Cavan Cavan postcode NSW Cavan is a locality in New South Wales covered by postcode 2582. Postcode 2582 State or territory New South Wales (NSW) Region Canberra Add a free Cavan business listing Be the first listing in Cavan Common questionsWhat is the postcode for Cavan?Cavan, NSW has the postcode 2582.What state is Cavan in?Cavan is in New South Wales (NSW).Does postcode 2582 cover more than one suburb?Yes. Postcode 2582 covers 22 localities, so the postcode alone does not identify Cavan. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.