Home Postcode finder NSW Osborne Osborne postcode NSW Osborne is a locality in New South Wales covered by postcode 2656. Postcode 2656 State or territory New South Wales (NSW) Region Canberra Add a free Osborne business listing Be the first listing in Osborne Common questionsWhat is the postcode for Osborne?Osborne, NSW has the postcode 2656.What state is Osborne in?Osborne is in New South Wales (NSW).Does postcode 2656 cover more than one suburb?Yes. Postcode 2656 covers 8 localities, so the postcode alone does not identify Osborne. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.