Home Postcode finder WA Innawanga Innawanga postcode WA Innawanga 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 Innawanga business listing Be the first listing in Innawanga Common questionsWhat is the postcode for Innawanga?Innawanga, WA has the postcode 6751.What state is Innawanga in?Innawanga 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 Innawanga. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.