Home Postcode finder SA Prospect Hill Prospect Hill postcode SA Prospect Hill is a locality in South Australia covered by postcode 5201. Postcode 5201 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Prospect Hill business listing Be the first listing in Prospect Hill Common questionsWhat is the postcode for Prospect Hill?Prospect Hill, SA has the postcode 5201.What state is Prospect Hill in?Prospect Hill is in South Australia (SA).Does postcode 5201 cover more than one suburb?Yes. Postcode 5201 covers 4 localities, so the postcode alone does not identify Prospect Hill. Browse other postcodes in South Australia, or widen the search to every Australian postcode.