Home Postcode finder QLD Porcupine Porcupine postcode QLD Porcupine is a locality in Queensland covered by postcode 4821. Postcode 4821 State or territory Queensland (QLD) Region North QLD Add a free Porcupine business listing Be the first listing in Porcupine Common questionsWhat is the postcode for Porcupine?Porcupine, QLD has the postcode 4821.What state is Porcupine in?Porcupine is in Queensland (QLD).Does postcode 4821 cover more than one suburb?Yes. Postcode 4821 covers 5 localities, so the postcode alone does not identify Porcupine. Browse other postcodes in Queensland, or widen the search to every Australian postcode.