Home Postcodes by state SA 5491 Postcode 5491 5491 is the postcode for 7 localities in SA: Belalie East, Belalie North, Bundaleer Gardens, Bundaleer North, Hornsdale, Jamestown and 1 more. Localities with postcode 5491Belalie EastSABelalie NorthSABundaleer GardensSABundaleer NorthSAHornsdaleSAJamestownSAWest BundaleerSA Postcode 5491 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 5490 · Postcode 5493