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