Home Postcode finder SA Mannum Mannum postcode SA Mannum is a locality in South Australia covered by postcode 5238. Postcode 5238 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Mannum business listing More business listings in Mannum Businesses in MannumFlat White HouseboatPurnong Road · 0418 810 110Kia Marina Houseboat HireRMB 520 A · (08) 8569 2400Mannum Community School49 Walker Ave · 08 85691503 Common questionsWhat is the postcode for Mannum?Mannum, SA has the postcode 5238.What state is Mannum in?Mannum is in South Australia (SA).Does postcode 5238 cover more than one suburb?Yes. Postcode 5238 covers 31 localities, so the postcode alone does not identify Mannum. Browse other postcodes in South Australia, or widen the search to every Australian postcode.