Home Postcodes by state SA 5734 Postcode 5734 5734 is the postcode for Oodnadatta, SA. Localities with postcode 5734OodnadattaSA Postcode 5734 State or territory South Australia (SA) Localities 1 Council area Unincorporated SA Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5733 · Postcode 5950