Home Postcode finder SA Hillbank Hillbank postcode SA Hillbank is a locality in South Australia covered by postcode 5112. Postcode 5112 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hillbank business listing More business listings in Hillbank Businesses in HillbankInk Hub6 Coach House Mews · 08 7324 3065Ink Hub6 Coach House Mews · 08 7324 3065Ink Hub6 Coach House Mews · 08 7324 3065 Common questionsWhat is the postcode for Hillbank?Hillbank, SA has the postcode 5112.What state is Hillbank in?Hillbank is in South Australia (SA).Does postcode 5112 cover more than one suburb?Yes. Postcode 5112 covers 6 localities, so the postcode alone does not identify Hillbank. Browse other postcodes in South Australia, or widen the search to every Australian postcode.