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