Home Postcode finder NSW Hollydeen Hollydeen postcode NSW Hollydeen is a locality in New South Wales covered by postcode 2328. Postcode 2328 State or territory New South Wales (NSW) Region Hunter Add a free Hollydeen business listing Be the first listing in Hollydeen Common questionsWhat is the postcode for Hollydeen?Hollydeen, NSW has the postcode 2328.What state is Hollydeen in?Hollydeen is in New South Wales (NSW).Does postcode 2328 cover more than one suburb?Yes. Postcode 2328 covers 10 localities, so the postcode alone does not identify Hollydeen. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.