port-willunga postcode sa Home ›› Postcode Finder ›› SA ›› Port-Willunga Port Willunga local listingsThe suburb of Port Willunga is located in SA and has a postcode of 5173. Free port willunga business listing! Get the first free listing in port willunga! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.