Home Postcodes by state SA 5462 Postcode 5462 5462 is the postcode for Blyth, SA. Localities with postcode 5462BlythSA Postcode 5462 State or territory South Australia (SA) Localities 1 Council area Wakefield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5461 · Postcode 5464