Home Postcodes by state WA Lake Carnegie Lake Carnegie postcode WA Lake Carnegie is a locality in Western Australia covered by postcode 6646. Postcode 6646 State or territory Western Australia (WA) Region North West Suburbs Council area Wiluna Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Lake Carnegie business listing Be the first listing in Lake Carnegie Also in postcode 6646Little Sandy DesertWA 6646WilunaWA 6646 Common questionsWhat is the postcode for Lake Carnegie?Lake Carnegie, WA has the postcode 6646.What state is Lake Carnegie in?Lake Carnegie is in Western Australia (WA).What council is Lake Carnegie in?Lake Carnegie is in the Wiluna local government area.Does postcode 6646 cover more than one suburb?Yes. Postcode 6646 covers 3 localities, so the postcode alone does not identify Lake Carnegie. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.