Home Postcode finder SA Bald Hills Bald Hills postcode SA Bald Hills is a locality in South Australia covered by postcode 5203. Postcode 5203 State or territory South Australia (SA) Region Adelaide Add a free Bald Hills business listing Be the first listing in Bald Hills Common questionsWhat is the postcode for Bald Hills?Bald Hills, SA has the postcode 5203.What state is Bald Hills in?Bald Hills is in South Australia (SA).Does postcode 5203 cover more than one suburb?Yes. Postcode 5203 covers 6 localities, so the postcode alone does not identify Bald Hills. Browse other postcodes in South Australia, or widen the search to every Australian postcode.