Home Postcode finder SA Marden Marden postcode SA Marden is a locality in South Australia covered by postcode 5070. Postcode 5070 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Marden business listing More business listings in Marden Businesses in MardenEastern Building GroupPayneham Rd, Marden SA, Australia · (08) 8363 3331Marden Secondary College1-37 Marden Rd · 08 83662888Open Access College1-37 Marden Rd · 08 83093500 Common questionsWhat is the postcode for Marden?Marden, SA has the postcode 5070.What state is Marden in?Marden is in South Australia (SA).Does postcode 5070 cover more than one suburb?Yes. Postcode 5070 covers 9 localities, so the postcode alone does not identify Marden. Browse other postcodes in South Australia, or widen the search to every Australian postcode.