Home Postcode finder WA Wittenoom Wittenoom postcode WA Wittenoom is a locality in Western Australia covered by postcode 6751. Postcode 6751 State or territory Western Australia (WA) Region North West Suburbs Add a free Wittenoom business listing Be the first listing in Wittenoom Common questionsWhat is the postcode for Wittenoom?Wittenoom, WA has the postcode 6751.What state is Wittenoom in?Wittenoom is in Western Australia (WA).Does postcode 6751 cover more than one suburb?Yes. Postcode 6751 covers 10 localities, so the postcode alone does not identify Wittenoom. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.