Home Postcode finder SA Leighton Leighton postcode SA Leighton is a locality in South Australia covered by postcode 5417. Postcode 5417 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Leighton business listing Be the first listing in Leighton Common questionsWhat is the postcode for Leighton?Leighton, SA has the postcode 5417.What state is Leighton in?Leighton is in South Australia (SA).Does postcode 5417 cover more than one suburb?Yes. Postcode 5417 covers 10 localities, so the postcode alone does not identify Leighton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.