Home Postcode finder SA Winninowie Winninowie postcode SA Winninowie is a locality in South Australia covered by postcode 5710. Postcode 5710 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Winninowie business listing Be the first listing in Winninowie Common questionsWhat is the postcode for Winninowie?Winninowie, SA has the postcode 5710.What state is Winninowie in?Winninowie is in South Australia (SA).Does postcode 5710 cover more than one suburb?Yes. Postcode 5710 covers 11 localities, so the postcode alone does not identify Winninowie. Browse other postcodes in South Australia, or widen the search to every Australian postcode.