Home Postcode finder SA Yankalilla Yankalilla postcode SA Yankalilla is a locality in South Australia covered by postcode 5203. Postcode 5203 State or territory South Australia (SA) Region Adelaide Add a free Yankalilla business listing More business listings in Yankalilla Businesses in YankalillaYankalilla Area SchoolLot 5 Main St · 08 85580888 Common questionsWhat is the postcode for Yankalilla?Yankalilla, SA has the postcode 5203.What state is Yankalilla in?Yankalilla is in South Australia (SA).Does postcode 5203 cover more than one suburb?Yes. Postcode 5203 covers 6 localities, so the postcode alone does not identify Yankalilla. Browse other postcodes in South Australia, or widen the search to every Australian postcode.