Home Postcode finder TAS Birchs Bay Birchs Bay postcode TAS Birchs Bay is a locality in Tasmania covered by postcode 7162. Postcode 7162 State or territory Tasmania (TAS) Region Tasmania Add a free Birchs Bay business listing Be the first listing in Birchs Bay Common questionsWhat is the postcode for Birchs Bay?Birchs Bay, TAS has the postcode 7162.What state is Birchs Bay in?Birchs Bay is in Tasmania (TAS).Does postcode 7162 cover more than one suburb?Yes. Postcode 7162 covers 2 localities, so the postcode alone does not identify Birchs Bay. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.