willunga postcode sa Home ›› Postcode Finder ›› SA ›› Willunga Willunga local listingsThe suburb of Willunga is located in SA and has a postcode of 5172. Free willunga business listing! 1Willunga Primary School247 Main Rd 08 855622342Willunga Waldorf School1 Jay Drive 08 855626553Willunga High School239 Main Rd 08 85562105 View more business listings in willunga Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.