Home Postcodes by state WA 6218 Postcode 6218 6218 is the postcode for Yarloop, WA. Localities with postcode 6218YarloopWA Postcode 6218 State or territory Western Australia (WA) Localities 1 Council area Harvey Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6215 · Postcode 6220