sheaoak-flat postcode sa Home ›› Postcode Finder ›› SA ›› Sheaoak-Flat Sheaoak Flat local listingsThe suburb of Sheaoak Flat is located in SA and has a postcode of 5581. Free sheaoak flat business listing! Get the first free listing in sheaoak flat! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.