Home Postcode finder SA Concordia Concordia postcode SA Concordia 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 Concordia business listing Be the first listing in Concordia Common questionsWhat is the postcode for Concordia?Concordia, SA has the postcode 5118.What state is Concordia in?Concordia 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 Concordia. Browse other postcodes in South Australia, or widen the search to every Australian postcode.