wallaroo-plain postcode sa Home ›› Postcode Finder ›› SA ›› Wallaroo-Plain Wallaroo Plain local listingsThe suburb of Wallaroo Plain is located in SA and has a postcode of 5556. Free wallaroo plain business listing! Get the first free listing in wallaroo plain! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.