Home Postcode finder NSW Clarence Clarence postcode NSW Clarence is a locality in New South Wales covered by postcode 2790. Postcode 2790 State or territory New South Wales (NSW) Region NSW Country West Add a free Clarence business listing Be the first listing in Clarence Common questionsWhat is the postcode for Clarence?Clarence, NSW has the postcode 2790.What state is Clarence in?Clarence is in New South Wales (NSW).Does postcode 2790 cover more than one suburb?Yes. Postcode 2790 covers 40 localities, so the postcode alone does not identify Clarence. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.