Home Postcode finder SA Hallett Cove Hallett Cove postcode SA Hallett Cove is a locality in South Australia covered by postcode 5158. Postcode 5158 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hallett Cove business listing Be the first listing in Hallett Cove Common questionsWhat is the postcode for Hallett Cove?Hallett Cove, SA has the postcode 5158.What state is Hallett Cove in?Hallett Cove is in South Australia (SA).Does postcode 5158 cover more than one suburb?Yes. Postcode 5158 covers 4 localities, so the postcode alone does not identify Hallett Cove. Browse other postcodes in South Australia, or widen the search to every Australian postcode.