Home Postcodes by state WA Lake Austin Lake Austin postcode WA Lake Austin is a locality in Western Australia covered by postcode 6640. Postcode 6640 State or territory Western Australia (WA) Region North West Suburbs Council area Cue Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Lake Austin business listing Be the first listing in Lake Austin Suburbs near Lake AustinStraight-line distance between locality centres.CueWA 6640 · 11.9 km Also in postcode 6640CueWA 6640East MurchisonWA 6640ReedyWA 6640Weld RangeWA 6640 Common questionsWhat is the postcode for Lake Austin?Lake Austin, WA has the postcode 6640.What state is Lake Austin in?Lake Austin is in Western Australia (WA).What council is Lake Austin in?Lake Austin is in the Cue local government area.Does postcode 6640 cover more than one suburb?Yes. Postcode 6640 covers 5 localities, so the postcode alone does not identify Lake Austin.What suburbs are near Lake Austin?The closest are Cue (11.9 km). Distances are straight lines between locality centres. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.