Home Postcode finder SA Marleston Marleston postcode SA Marleston is a locality in South Australia covered by postcode 5033. Postcode 5033 State or territory South Australia (SA) Region Adelaide Add a free Marleston business listing More business listings in Marleston Businesses in MarlestonCarCoop | Rent To Own Cars in Adelaide59 Galway Ave, Marleston SA 5033, Australia · 1300 614 299Emergency Dental Care235 Marion Rd · 0412220298Renniks Events264 Richmond Rd · 0883712117 Common questionsWhat is the postcode for Marleston?Marleston, SA has the postcode 5033.What state is Marleston in?Marleston is in South Australia (SA).Does postcode 5033 cover more than one suburb?Yes. Postcode 5033 covers 6 localities, so the postcode alone does not identify Marleston. Browse other postcodes in South Australia, or widen the search to every Australian postcode.