Home Postcode finder SA Kangaroo Flat Kangaroo Flat postcode SA Kangaroo Flat is a locality in South Australia covered by postcode 5118. Postcode 5118 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Kangaroo Flat business listing Be the first listing in Kangaroo Flat Common questionsWhat is the postcode for Kangaroo Flat?Kangaroo Flat, SA has the postcode 5118.What state is Kangaroo Flat in?Kangaroo Flat is in South Australia (SA).Does postcode 5118 cover more than one suburb?Yes. Postcode 5118 covers 16 localities, so the postcode alone does not identify Kangaroo Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.