mannum postcode sa Home ›› Postcode Finder ›› SA ›› Mannum Mannum local listingsThe suburb of Mannum is located in SA and has a postcode of 5238. Free mannum business listing! 1Mannum Community School49 Walker Ave 08 856915032Flat White HouseboatPurnong Road 0418 810 1103Kia Marina Houseboat HireRMB 520 A (08) 8569 2400 View more business listings in mannum Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.