Home Postcode finder NSW Oolong Oolong postcode NSW Oolong is a locality in New South Wales covered by postcode 2581. Postcode 2581 State or territory New South Wales (NSW) Region Canberra Add a free Oolong business listing Be the first listing in Oolong Common questionsWhat is the postcode for Oolong?Oolong, NSW has the postcode 2581.What state is Oolong in?Oolong is in New South Wales (NSW).Does postcode 2581 cover more than one suburb?Yes. Postcode 2581 covers 17 localities, so the postcode alone does not identify Oolong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.