Home Postcodes by state SA 5454 Postcode 5454 5454 is the postcode for 7 localities in SA: Andrews, Broughton River Valley, Euromina, Hacklins Corner, Mayfield, Spalding and 1 more. Localities with postcode 5454AndrewsSABroughton River ValleySAEurominaSAHacklins CornerSAMayfieldSASpaldingSAWashpoolSA Postcode 5454 State or territory South Australia (SA) Localities 7 Council area Northern Areas Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5453 · Postcode 5455