Home Postcode finder SA Terowie Terowie postcode SA Terowie is a locality in South Australia covered by postcode 5421. Postcode 5421 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Terowie business listing More business listings in Terowie Businesses in TerowieTerowi Rural SchoolMain St · 08 86591080 Common questionsWhat is the postcode for Terowie?Terowie, SA has the postcode 5421.What state is Terowie in?Terowie is in South Australia (SA).Does postcode 5421 cover more than one suburb?Yes. Postcode 5421 covers 2 localities, so the postcode alone does not identify Terowie. Browse other postcodes in South Australia, or widen the search to every Australian postcode.