Home Postcodes by state WA 6215 Postcode 6215 6215 is the postcode for 6 localities in WA: Hamel, Lake Clifton, Nanga Brook, Preston Beach, Wagerup and Waroona. Localities with postcode 6215HamelWALake CliftonWANanga BrookWAPreston BeachWAWagerupWAWaroonaWA Postcode 6215 State or territory Western Australia (WA) Localities 6 Council area Waroona Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6214 · Postcode 6218