Home Postcode finder SA Wynarka Wynarka postcode SA Wynarka is a locality in South Australia covered by postcode 5306. Postcode 5306 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Wynarka business listing Be the first listing in Wynarka Common questionsWhat is the postcode for Wynarka?Wynarka, SA has the postcode 5306.What state is Wynarka in?Wynarka is in South Australia (SA).Does postcode 5306 cover more than one suburb?No. Postcode 5306 covers Wynarka only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.