Home Postcode finder NSW Wallalong Wallalong postcode NSW Wallalong is a locality in New South Wales covered by postcode 2320. Postcode 2320 State or territory New South Wales (NSW) Region Hunter Add a free Wallalong business listing Be the first listing in Wallalong Common questionsWhat is the postcode for Wallalong?Wallalong, NSW has the postcode 2320.What state is Wallalong in?Wallalong is in New South Wales (NSW).Does postcode 2320 cover more than one suburb?Yes. Postcode 2320 covers 30 localities, so the postcode alone does not identify Wallalong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.