Home Postcodes by state WA 6290 Postcode 6290 6290 is the postcode for 6 localities in WA: Augusta, Deepdene, East Augusta, Kudardup, Leeuwin and Molloy Island. Localities with postcode 6290AugustaWADeepdeneWAEast AugustaWAKudardupWALeeuwinWAMolloy IslandWA Postcode 6290 State or territory Western Australia (WA) Localities 6 Council area Augusta Margaret River Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6288 · Postcode 6302