Home Postcode finder SA Nonning Nonning postcode SA Nonning 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 Nonning business listing Be the first listing in Nonning Common questionsWhat is the postcode for Nonning?Nonning, SA has the postcode 5710.What state is Nonning in?Nonning 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 Nonning. Browse other postcodes in South Australia, or widen the search to every Australian postcode.