Home Postcode finder NSW Gosforth Gosforth postcode NSW Gosforth 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 Gosforth business listing Be the first listing in Gosforth Common questionsWhat is the postcode for Gosforth?Gosforth, NSW has the postcode 2320.What state is Gosforth in?Gosforth 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 Gosforth. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.