Home Postcode finder SA Carrickalinga Carrickalinga postcode SA Carrickalinga is a locality in South Australia covered by postcode 5204. Postcode 5204 State or territory South Australia (SA) Region Adelaide Add a free Carrickalinga business listing Be the first listing in Carrickalinga Common questionsWhat is the postcode for Carrickalinga?Carrickalinga, SA has the postcode 5204.What state is Carrickalinga in?Carrickalinga is in South Australia (SA).Does postcode 5204 cover more than one suburb?Yes. Postcode 5204 covers 10 localities, so the postcode alone does not identify Carrickalinga. Browse other postcodes in South Australia, or widen the search to every Australian postcode.