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