Home Postcode finder NSW Twelve Mile Twelve Mile postcode NSW Twelve Mile is a locality in New South Wales covered by postcode 2850. Postcode 2850 State or territory New South Wales (NSW) Region NSW Country West Add a free Twelve Mile business listing Be the first listing in Twelve Mile Common questionsWhat is the postcode for Twelve Mile?Twelve Mile, NSW has the postcode 2850.What state is Twelve Mile in?Twelve Mile is in New South Wales (NSW).Does postcode 2850 cover more than one suburb?Yes. Postcode 2850 covers 77 localities, so the postcode alone does not identify Twelve Mile. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.