Home Postcode finder SA Rosetown Rosetown postcode SA Rosetown is a locality in South Australia covered by postcode 5275. Postcode 5275 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Rosetown business listing Be the first listing in Rosetown Common questionsWhat is the postcode for Rosetown?Rosetown, SA has the postcode 5275.What state is Rosetown in?Rosetown is in South Australia (SA).Does postcode 5275 cover more than one suburb?Yes. Postcode 5275 covers 15 localities, so the postcode alone does not identify Rosetown. Browse other postcodes in South Australia, or widen the search to every Australian postcode.