Home Postcode finder TAS Howden Howden postcode TAS Howden is a locality in Tasmania covered by postcode 7054. Postcode 7054 State or territory Tasmania (TAS) Region Tasmania Add a free Howden business listing Be the first listing in Howden Common questionsWhat is the postcode for Howden?Howden, TAS has the postcode 7054.What state is Howden in?Howden is in Tasmania (TAS).Does postcode 7054 cover more than one suburb?Yes. Postcode 7054 covers 13 localities, so the postcode alone does not identify Howden. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.