Home Postcode finder SA Caveton Caveton postcode SA Caveton is a locality in South Australia covered by postcode 5291. Postcode 5291 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Caveton business listing Be the first listing in Caveton Common questionsWhat is the postcode for Caveton?Caveton, SA has the postcode 5291.What state is Caveton in?Caveton is in South Australia (SA).Does postcode 5291 cover more than one suburb?Yes. Postcode 5291 covers 34 localities, so the postcode alone does not identify Caveton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.