Home Postcode finder WA Cambridge Gulf Cambridge Gulf postcode WA Cambridge Gulf is a locality in Western Australia covered by postcode 6743. Postcode 6743 State or territory Western Australia (WA) Region North West Suburbs Add a free Cambridge Gulf business listing Be the first listing in Cambridge Gulf Common questionsWhat is the postcode for Cambridge Gulf?Cambridge Gulf, WA has the postcode 6743.What state is Cambridge Gulf in?Cambridge Gulf is in Western Australia (WA).Does postcode 6743 cover more than one suburb?Yes. Postcode 6743 covers 6 localities, so the postcode alone does not identify Cambridge Gulf. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.