Home Postcode finder NSW Dungog Dungog postcode NSW Dungog is a locality in New South Wales covered by postcode 2420. Postcode 2420 State or territory New South Wales (NSW) Region Hunter Add a free Dungog business listing More business listings in Dungog Businesses in DungogDungog High School126 Eliza St · 02 49923022Dungog Public School11 Chapman St · 02 49921384St Joseph's School49 Brown St · 02 49921377 Common questionsWhat is the postcode for Dungog?Dungog, NSW has the postcode 2420.What state is Dungog in?Dungog is in New South Wales (NSW).Does postcode 2420 cover more than one suburb?Yes. Postcode 2420 covers 23 localities, so the postcode alone does not identify Dungog. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.