Home Postcode finder WA Dirk Hartog Island Dirk Hartog Island postcode WA Dirk Hartog Island is a locality in Western Australia covered by postcode 6537. Postcode 6537 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Dirk Hartog Island business listing Be the first listing in Dirk Hartog Island Common questionsWhat is the postcode for Dirk Hartog Island?Dirk Hartog Island, WA has the postcode 6537.What state is Dirk Hartog Island in?Dirk Hartog Island is in Western Australia (WA).Does postcode 6537 cover more than one suburb?Yes. Postcode 6537 covers 7 localities, so the postcode alone does not identify Dirk Hartog Island. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.