Home Postcodes by state WA 6019 Postcode 6019 6019 is the postcode for 2 localities in WA: Scarborough and Wembley Downs. Localities with postcode 6019ScarboroughWAWembley DownsWA Postcode 6019 State or territory Western Australia (WA) Localities 2 Council area Stirling Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6018 · Postcode 6020