Home Postcodes by state WA 6083 Postcode 6083 6083 is the postcode for 2 localities in WA: Gidgegannup and Morangup. Localities with postcode 6083GidgegannupWAMorangupWA Postcode 6083 State or territory Western Australia (WA) Localities 2 Council area Swan; Toodyay Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6082 · Postcode 6084