Home Postcode finder QLD Yam Island Yam Island postcode QLD Yam Island is a locality in Queensland covered by postcode 4875. Postcode 4875 State or territory Queensland (QLD) Region North QLD Add a free Yam Island business listing Be the first listing in Yam Island Common questionsWhat is the postcode for Yam Island?Yam Island, QLD has the postcode 4875.What state is Yam Island in?Yam Island is in Queensland (QLD).Does postcode 4875 cover more than one suburb?Yes. Postcode 4875 covers 17 localities, so the postcode alone does not identify Yam Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.