Home Postcodes by state SA 5320 Postcode 5320 5320 is the postcode for 13 localities in SA: Beatty, Beaumonts, Brenda Park, Bundey, Eba, Lindley and 7 more. Localities with postcode 5320BeattySABeaumontsSABrenda ParkSABundeySAEbaSALindleySAMaudeSAMorganSAMorphetts FlatSAMurbkoSANorth West BendSAStuartSAWombats RestSA Postcode 5320 State or territory South Australia (SA) Localities 13 Council area Mid Murray; Goyder; Mainly Mid Murray, partly Loxton Waikerie Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5311 · Postcode 5321