Home Postcodes by state SA 5470 Postcode 5470 5470 is the postcode for Yacka, SA. Localities with postcode 5470YackaSA Postcode 5470 State or territory South Australia (SA) Localities 1 Council area Northern Areas Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5464 · Postcode 5471