Home Postcodes by state WA 6061 Postcode 6061 6061 is the postcode for 4 localities in WA: Balga, Mirrabooka, Nollamara and Westminster. Localities with postcode 6061BalgaWAMirrabookaWANollamaraWAWestminsterWA Postcode 6061 State or territory Western Australia (WA) Localities 4 Council area Stirling Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6060 · Postcode 6062