Home Postcode finder SA Sandleton Sandleton postcode SA Sandleton is a locality in South Australia covered by postcode 5356. Postcode 5356 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Sandleton business listing Be the first listing in Sandleton Common questionsWhat is the postcode for Sandleton?Sandleton, SA has the postcode 5356.What state is Sandleton in?Sandleton is in South Australia (SA).Does postcode 5356 cover more than one suburb?Yes. Postcode 5356 covers 7 localities, so the postcode alone does not identify Sandleton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.