Home Postcode finder TAS Gardners Bay Gardners Bay postcode TAS Gardners Bay is a locality in Tasmania covered by postcode 7112. Postcode 7112 State or territory Tasmania (TAS) Region Tasmania Add a free Gardners Bay business listing Be the first listing in Gardners Bay Common questionsWhat is the postcode for Gardners Bay?Gardners Bay, TAS has the postcode 7112.What state is Gardners Bay in?Gardners Bay is in Tasmania (TAS).Does postcode 7112 cover more than one suburb?Yes. Postcode 7112 covers 10 localities, so the postcode alone does not identify Gardners Bay. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.