Home Postcode finder QLD Magnetic Island Magnetic Island postcode QLD Magnetic Island is a locality in Queensland covered by postcode 4819. Postcode 4819 State or territory Queensland (QLD) Region North QLD Add a free Magnetic Island business listing Be the first listing in Magnetic Island Common questionsWhat is the postcode for Magnetic Island?Magnetic Island, QLD has the postcode 4819.What state is Magnetic Island in?Magnetic Island is in Queensland (QLD).Does postcode 4819 cover more than one suburb?Yes. Postcode 4819 covers 7 localities, so the postcode alone does not identify Magnetic Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.