Home Postcode finder NSW One Tree One Tree postcode NSW One Tree is a locality in New South Wales covered by postcode 2711. Postcode 2711 State or territory New South Wales (NSW) Region Canberra Add a free One Tree business listing Be the first listing in One Tree Common questionsWhat is the postcode for One Tree?One Tree, NSW has the postcode 2711.What state is One Tree in?One Tree is in New South Wales (NSW).Does postcode 2711 cover more than one suburb?Yes. Postcode 2711 covers 13 localities, so the postcode alone does not identify One Tree. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.