Home Postcode finder QLD Lamb Island Lamb Island postcode QLD Lamb Island is a locality in Queensland covered by postcode 4184. Postcode 4184 State or territory Queensland (QLD) Region South Subs Add a free Lamb Island business listing Be the first listing in Lamb Island Common questionsWhat is the postcode for Lamb Island?Lamb Island, QLD has the postcode 4184.What state is Lamb Island in?Lamb Island is in Queensland (QLD).Does postcode 4184 cover more than one suburb?Yes. Postcode 4184 covers 7 localities, so the postcode alone does not identify Lamb Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.