Home Postcode finder TAS Preston Preston postcode TAS Preston is a locality in Tasmania covered by postcode 7315. Postcode 7315 State or territory Tasmania (TAS) Region Tasmania Add a free Preston business listing Be the first listing in Preston Common questionsWhat is the postcode for Preston?Preston, TAS has the postcode 7315.What state is Preston in?Preston is in Tasmania (TAS).Does postcode 7315 cover more than one suburb?Yes. Postcode 7315 covers 17 localities, so the postcode alone does not identify Preston. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.