Home Postcode finder TAS Oonah Oonah postcode TAS Oonah is a locality in Tasmania covered by postcode 7325. Postcode 7325 State or territory Tasmania (TAS) Region Tasmania Add a free Oonah business listing Be the first listing in Oonah Common questionsWhat is the postcode for Oonah?Oonah, TAS has the postcode 7325.What state is Oonah in?Oonah is in Tasmania (TAS).Does postcode 7325 cover more than one suburb?Yes. Postcode 7325 covers 20 localities, so the postcode alone does not identify Oonah. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.