Home Postcodes by state SA 5381 Postcode 5381 5381 is the postcode for 9 localities in SA: Brady Creek, Bright, Emu Downs, Geranium Plains, Hallelujah Hills, Robertstown and 3 more. Localities with postcode 5381Brady CreekSABrightSAEmu DownsSAGeranium PlainsSAHallelujah HillsSARobertstownSARocky PlainSAWorlds EndSAWorlds End CreekSA Postcode 5381 State or territory South Australia (SA) Localities 9 Council area Goyder Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5374 · Postcode 5400