Home Postcode finder WA Bernier Island Bernier Island postcode WA Bernier Island is a locality in Western Australia covered by postcode 6701. Postcode 6701 State or territory Western Australia (WA) Region North West Suburbs Add a free Bernier Island business listing Be the first listing in Bernier Island Common questionsWhat is the postcode for Bernier Island?Bernier Island, WA has the postcode 6701.What state is Bernier Island in?Bernier Island is in Western Australia (WA).Does postcode 6701 cover more than one suburb?Yes. Postcode 6701 covers 28 localities, so the postcode alone does not identify Bernier Island. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.