Home Postcodes by state WA 6239 Postcode 6239 6239 is the postcode for 11 localities in WA: Argyle, Beelerup, Brookhampton, Charley Creek, Donnybrook, Glen Mervyn and 5 more. Localities with postcode 6239ArgyleWABeelerupWABrookhamptonWACharley CreekWADonnybrookWAGlen MervynWAPaynedaleWAQueenwoodWAThomson BrookWAUpper CapelWAYabberupWA Postcode 6239 State or territory Western Australia (WA) Localities 11 Council area Donnybrook-Balingup Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6237 · Postcode 6240