Home Postcodes by state WA 6110 Postcode 6110 6110 is the postcode for 4 localities in WA: Gosnells, Huntingdale, Martin and Southern River. Localities with postcode 6110GosnellsWAHuntingdaleWAMartinWASouthern RiverWA Postcode 6110 State or territory Western Australia (WA) Localities 4 Council area Gosnells Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6109 · Postcode 6111