Home Postcode finder SA Buckingham Buckingham postcode SA Buckingham 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 Buckingham business listing Be the first listing in Buckingham Common questionsWhat is the postcode for Buckingham?Buckingham, SA has the postcode 5270.What state is Buckingham in?Buckingham 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 Buckingham. Browse other postcodes in South Australia, or widen the search to every Australian postcode.