Home Postcode finder TAS Retreat Retreat postcode TAS Retreat is a locality in Tasmania covered by postcode 7254. Postcode 7254 State or territory Tasmania (TAS) Region Tasmania Add a free Retreat business listing Be the first listing in Retreat Common questionsWhat is the postcode for Retreat?Retreat, TAS has the postcode 7254.What state is Retreat in?Retreat is in Tasmania (TAS).Does postcode 7254 cover more than one suburb?Yes. Postcode 7254 covers 7 localities, so the postcode alone does not identify Retreat. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.