Home Postcode finder SA Willyaroo Willyaroo postcode SA Willyaroo is a locality in South Australia covered by postcode 5255. Postcode 5255 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Willyaroo business listing Be the first listing in Willyaroo Common questionsWhat is the postcode for Willyaroo?Willyaroo, SA has the postcode 5255.What state is Willyaroo in?Willyaroo is in South Australia (SA).Does postcode 5255 cover more than one suburb?Yes. Postcode 5255 covers 19 localities, so the postcode alone does not identify Willyaroo. Browse other postcodes in South Australia, or widen the search to every Australian postcode.