Home Postcode finder NSW Harden Harden postcode NSW Harden is a locality in New South Wales covered by postcode 2587. Postcode 2587 State or territory New South Wales (NSW) Region Canberra Add a free Harden business listing Be the first listing in Harden Common questionsWhat is the postcode for Harden?Harden, NSW has the postcode 2587.What state is Harden in?Harden is in New South Wales (NSW).Does postcode 2587 cover more than one suburb?Yes. Postcode 2587 covers 6 localities, so the postcode alone does not identify Harden. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.