Home Postcodes by state WA 6090 Postcode 6090 6090 is the postcode for Malaga, WA. Localities with postcode 6090MalagaWA Postcode 6090 State or territory Western Australia (WA) Localities 1 Council area Swan Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6084 · Postcode 6100