Home Postcode finder SA Swede Flat Swede Flat postcode SA Swede Flat is a locality in South Australia covered by postcode 5270. Postcode 5270 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Swede Flat business listing Be the first listing in Swede Flat Common questionsWhat is the postcode for Swede Flat?Swede Flat, SA has the postcode 5270.What state is Swede Flat in?Swede Flat is in South Australia (SA).Does postcode 5270 cover more than one suburb?Yes. Postcode 5270 covers 6 localities, so the postcode alone does not identify Swede Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.