risdon-park-south postcode sa Home ›› Postcode Finder ›› SA ›› Risdon-Park-South Risdon Park South local listingsThe suburb of Risdon Park South is located in SA and has a postcode of 5540. Free risdon park south business listing! Get the first free listing in risdon park south! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.