Home Postcode finder TAS Howth Howth postcode TAS Howth is a locality in Tasmania covered by postcode 7316. Postcode 7316 State or territory Tasmania (TAS) Region Tasmania Add a free Howth business listing Be the first listing in Howth Common questionsWhat is the postcode for Howth?Howth, TAS has the postcode 7316.What state is Howth in?Howth is in Tasmania (TAS).Does postcode 7316 cover more than one suburb?Yes. Postcode 7316 covers 11 localities, so the postcode alone does not identify Howth. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.