Home Postcode finder SA Colton Colton postcode SA Colton is a locality in South Australia covered by postcode 5670. Postcode 5670 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Colton business listing Be the first listing in Colton Common questionsWhat is the postcode for Colton?Colton, SA has the postcode 5670.What state is Colton in?Colton is in South Australia (SA).Does postcode 5670 cover more than one suburb?Yes. Postcode 5670 covers 11 localities, so the postcode alone does not identify Colton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.