Home Postcodes by state WA 6035 Postcode 6035 6035 is the postcode for Yanchep, WA. Localities with postcode 6035YanchepWA Postcode 6035 State or territory Western Australia (WA) Localities 1 Council area Wanneroo Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6034 · Postcode 6036