robertstown postcode sa Home ›› Postcode Finder ›› SA ›› Robertstown Robertstown local listingsThe suburb of Robertstown is located in SA and has a postcode of 5381. Free robertstown business listing! 1Robertstown Primary School3 Corey St 08 85817127 View more business listings in robertstown Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.