Home Postcode finder TAS Chasm Creek Chasm Creek postcode TAS Chasm Creek is a locality in Tasmania covered by postcode 7321. Postcode 7321 State or territory Tasmania (TAS) Region Tasmania Add a free Chasm Creek business listing Be the first listing in Chasm Creek Common questionsWhat is the postcode for Chasm Creek?Chasm Creek, TAS has the postcode 7321.What state is Chasm Creek in?Chasm Creek is in Tasmania (TAS).Does postcode 7321 cover more than one suburb?Yes. Postcode 7321 covers 35 localities, so the postcode alone does not identify Chasm Creek. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.