Home Postcode finder SA Willunga Hill Willunga Hill postcode SA Willunga Hill is a locality in South Australia covered by postcode 5172. Postcode 5172 State or territory South Australia (SA) Region Adelaide Add a free Willunga Hill business listing Be the first listing in Willunga Hill Common questionsWhat is the postcode for Willunga Hill?Willunga Hill, SA has the postcode 5172.What state is Willunga Hill in?Willunga Hill is in South Australia (SA).Does postcode 5172 cover more than one suburb?Yes. Postcode 5172 covers 13 localities, so the postcode alone does not identify Willunga Hill. Browse other postcodes in South Australia, or widen the search to every Australian postcode.