Home Postcode finder SA Gemmells Gemmells postcode SA Gemmells is a locality in South Australia covered by postcode 5255. Postcode 5255 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Gemmells business listing Be the first listing in Gemmells Common questionsWhat is the postcode for Gemmells?Gemmells, SA has the postcode 5255.What state is Gemmells in?Gemmells is in South Australia (SA).Does postcode 5255 cover more than one suburb?Yes. Postcode 5255 covers 19 localities, so the postcode alone does not identify Gemmells. Browse other postcodes in South Australia, or widen the search to every Australian postcode.