Home Postcode finder SA Coonawarra Coonawarra postcode SA Coonawarra is a locality in South Australia covered by postcode 5263. Postcode 5263 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Coonawarra business listing Be the first listing in Coonawarra Common questionsWhat is the postcode for Coonawarra?Coonawarra, SA has the postcode 5263.What state is Coonawarra in?Coonawarra is in South Australia (SA).Does postcode 5263 cover more than one suburb?No. Postcode 5263 covers Coonawarra only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.