Home Postcode finder TAS Gladstone Gladstone postcode TAS Gladstone is a locality in Tasmania covered by postcode 7264. Postcode 7264 State or territory Tasmania (TAS) Region Tasmania Add a free Gladstone business listing Be the first listing in Gladstone Common questionsWhat is the postcode for Gladstone?Gladstone, TAS has the postcode 7264.What state is Gladstone in?Gladstone is in Tasmania (TAS).Does postcode 7264 cover more than one suburb?Yes. Postcode 7264 covers 15 localities, so the postcode alone does not identify Gladstone. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.