Home Postcode finder SA Willow Creek Willow Creek postcode SA Willow Creek is a locality in South Australia covered by postcode 5211. Postcode 5211 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Willow Creek business listing Be the first listing in Willow Creek Common questionsWhat is the postcode for Willow Creek?Willow Creek, SA has the postcode 5211.What state is Willow Creek in?Willow Creek is in South Australia (SA).Does postcode 5211 cover more than one suburb?Yes. Postcode 5211 covers 12 localities, so the postcode alone does not identify Willow Creek. Browse other postcodes in South Australia, or widen the search to every Australian postcode.