Home Postcode finder WA Babbage Island Babbage Island postcode WA Babbage 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 Babbage Island business listing Be the first listing in Babbage Island Common questionsWhat is the postcode for Babbage Island?Babbage Island, WA has the postcode 6701.What state is Babbage Island in?Babbage 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 Babbage Island. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.