Home Postcode finder SA Malpas Malpas postcode SA Malpas is a locality in South Australia covered by postcode 5311. Postcode 5311 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Malpas business listing Be the first listing in Malpas Common questionsWhat is the postcode for Malpas?Malpas, SA has the postcode 5311.What state is Malpas in?Malpas is in South Australia (SA).Does postcode 5311 cover more than one suburb?Yes. Postcode 5311 covers 13 localities, so the postcode alone does not identify Malpas. Browse other postcodes in South Australia, or widen the search to every Australian postcode.