Home Postcode finder SA Grace Plains Grace Plains postcode SA Grace Plains is a locality in South Australia covered by postcode 5502. Postcode 5502 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Grace Plains business listing Be the first listing in Grace Plains Common questionsWhat is the postcode for Grace Plains?Grace Plains, SA has the postcode 5502.What state is Grace Plains in?Grace Plains is in South Australia (SA).Does postcode 5502 cover more than one suburb?Yes. Postcode 5502 covers 6 localities, so the postcode alone does not identify Grace Plains. Browse other postcodes in South Australia, or widen the search to every Australian postcode.