Home Postcode finder NSW Mount Olive Mount Olive postcode NSW Mount Olive is a locality in New South Wales covered by postcode 2330. Postcode 2330 State or territory New South Wales (NSW) Region Hunter Add a free Mount Olive business listing Be the first listing in Mount Olive Common questionsWhat is the postcode for Mount Olive?Mount Olive, NSW has the postcode 2330.What state is Mount Olive in?Mount Olive is in New South Wales (NSW).Does postcode 2330 cover more than one suburb?Yes. Postcode 2330 covers 63 localities, so the postcode alone does not identify Mount Olive. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.