Home Postcode finder 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 Add a free Whim Creek business listing Be the first listing in Whim Creek 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).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.