willamulka postcode sa Home ›› Postcode Finder ›› SA ›› Willamulka Willamulka local listingsThe suburb of Willamulka is located in SA and has a postcode of 5554. Free willamulka business listing! Get the first free listing in willamulka! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.