Home Postcode finder SA Greenbanks Greenbanks postcode SA Greenbanks is a locality in South Australia covered by postcode 5253. Postcode 5253 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Greenbanks business listing Be the first listing in Greenbanks Common questionsWhat is the postcode for Greenbanks?Greenbanks, SA has the postcode 5253.What state is Greenbanks in?Greenbanks is in South Australia (SA).Does postcode 5253 cover more than one suburb?Yes. Postcode 5253 covers 25 localities, so the postcode alone does not identify Greenbanks. Browse other postcodes in South Australia, or widen the search to every Australian postcode.