Home Postcode finder QLD Curtis Island Curtis Island postcode QLD Curtis Island is a locality in Queensland covered by postcode 4680. Postcode 4680 State or territory Queensland (QLD) Region Central QLD Add a free Curtis Island business listing Be the first listing in Curtis Island Common questionsWhat is the postcode for Curtis Island?Curtis Island, QLD has the postcode 4680.What state is Curtis Island in?Curtis Island is in Queensland (QLD).Does postcode 4680 cover more than one suburb?Yes. Postcode 4680 covers 41 localities, so the postcode alone does not identify Curtis Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.