Home Postcodes by state WA 6229 Postcode 6229 6229 is the postcode for 2 localities in WA: Picton and Picton East. Localities with postcode 6229PictonWAPicton EastWA Postcode 6229 State or territory Western Australia (WA) Localities 2 Council area Bunbury; Dardanup Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6228 · Postcode 6230