Home Postcodes by state SA 5204 Postcode 5204 5204 is the postcode for 10 localities in SA: Cape Jervis, Carrickalinga, Deep Creek, Delamere, Hay Flat, Normanville and 4 more. Localities with postcode 5204Cape JervisSACarrickalingaSADeep CreekSADelamereSAHay FlatSANormanvilleSARapid BaySASecond ValleySASilvertonSAWirrina CoveSA Postcode 5204 State or territory South Australia (SA) Localities 10 Council area Yankalilla Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5203 · Postcode 5210