Home Postcodes by state WA Whim Creek Whim Creek postcode WA Whim Creek is a locality in Western Australia covered by postcode 6718. Postcode 6718 State or territory Western Australia (WA) Region North West Suburbs Council area Karratha Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Whim Creek business listing Be the first listing in Whim Creek Also in postcode 6718RoebourneWA 6718 Common questionsWhat is the postcode for Whim Creek?Whim Creek, WA has the postcode 6718.What state is Whim Creek in?Whim Creek is in Western Australia (WA).What council is Whim Creek in?Whim Creek is in the Karratha local government area.Does postcode 6718 cover more than one suburb?Yes. Postcode 6718 covers 2 localities, so the postcode alone does not identify Whim Creek. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.