Home Postcode finder SA Wonuarra Wonuarra postcode SA Wonuarra is a locality in South Australia covered by postcode 5340. Postcode 5340 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Wonuarra business listing Be the first listing in Wonuarra Common questionsWhat is the postcode for Wonuarra?Wonuarra, SA has the postcode 5340.What state is Wonuarra in?Wonuarra is in South Australia (SA).Does postcode 5340 cover more than one suburb?Yes. Postcode 5340 covers 6 localities, so the postcode alone does not identify Wonuarra. Browse other postcodes in South Australia, or widen the search to every Australian postcode.