whyalla postcode sa Home ›› Postcode Finder ›› SA ›› Whyalla Whyalla local listingsThe suburb of Whyalla is located in SA and has a postcode of 5600. Free whyalla business listing! 1Whyalla High SchoolBroadbent Terrace 08 864588442Samaritan College70 Gowrie Ave 08 864585683Samaritan CollegeDarling Terrace 08 86458381 View more business listings in whyalla Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.