Home Postcode finder SA Leigh Creek Leigh Creek postcode SA Leigh Creek is a locality in South Australia covered by postcode 5731. Postcode 5731 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Leigh Creek business listing More business listings in Leigh Creek Businesses in Leigh CreekLeigh Creek Area SchoolBlack Oak Drive · 08 86752062 Common questionsWhat is the postcode for Leigh Creek?Leigh Creek, SA has the postcode 5731.What state is Leigh Creek in?Leigh Creek is in South Australia (SA).Does postcode 5731 cover more than one suburb?Yes. Postcode 5731 covers 9 localities, so the postcode alone does not identify Leigh Creek. Browse other postcodes in South Australia, or widen the search to every Australian postcode.