Home Postcode finder TAS Tyenna Tyenna postcode TAS Tyenna is a locality in Tasmania covered by postcode 7140. Postcode 7140 State or territory Tasmania (TAS) Region Tasmania Add a free Tyenna business listing Be the first listing in Tyenna Common questionsWhat is the postcode for Tyenna?Tyenna, TAS has the postcode 7140.What state is Tyenna in?Tyenna is in Tasmania (TAS).Does postcode 7140 cover more than one suburb?Yes. Postcode 7140 covers 48 localities, so the postcode alone does not identify Tyenna. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.