Home Postcode finder NSW Olney Olney postcode NSW Olney is a locality in New South Wales covered by postcode 2325. Postcode 2325 State or territory New South Wales (NSW) Region Hunter Add a free Olney business listing Be the first listing in Olney Common questionsWhat is the postcode for Olney?Olney, NSW has the postcode 2325.What state is Olney in?Olney is in New South Wales (NSW).Does postcode 2325 cover more than one suburb?Yes. Postcode 2325 covers 27 localities, so the postcode alone does not identify Olney. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.