Home Postcode finder SA Blanchetown Blanchetown postcode SA Blanchetown is a locality in South Australia covered by postcode 5357. Postcode 5357 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Blanchetown business listing More business listings in Blanchetown Businesses in BlanchetownBlanchetown Primary SchoolGodley St · 08 85405041 Common questionsWhat is the postcode for Blanchetown?Blanchetown, SA has the postcode 5357.What state is Blanchetown in?Blanchetown is in South Australia (SA).Does postcode 5357 cover more than one suburb?Yes. Postcode 5357 covers 5 localities, so the postcode alone does not identify Blanchetown. Browse other postcodes in South Australia, or widen the search to every Australian postcode.