willunga-south postcode sa Home ›› Postcode Finder ›› SA ›› Willunga-South Willunga South local listingsThe suburb of Willunga South is located in SA and has a postcode of 5172. Free willunga south business listing! Get the first free listing in willunga south! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.