Home Postcode finder SA Gosse Gosse postcode SA Gosse is a locality in South Australia covered by postcode 5223. Postcode 5223 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Gosse business listing Be the first listing in Gosse Common questionsWhat is the postcode for Gosse?Gosse, SA has the postcode 5223.What state is Gosse in?Gosse is in South Australia (SA).Does postcode 5223 cover more than one suburb?Yes. Postcode 5223 covers 30 localities, so the postcode alone does not identify Gosse. Browse other postcodes in South Australia, or widen the search to every Australian postcode.