Home Postcode finder QLD Mackay Harbour Mackay Harbour postcode QLD Mackay Harbour is a locality in Queensland covered by postcode 4740. Postcode 4740 State or territory Queensland (QLD) Region Central QLD Add a free Mackay Harbour business listing More business listings in Mackay Harbour Businesses in Mackay HarbourBolden Electrical Pty Ltd - Mackayb06/216 Harbour Road, Mackay Harbour QLD 4740, Australia · (07) 4954 9112Elizabeth E II CruisesMulherin Drive, Mackay Harbour Queensland, Australia · 07 4955 2563Newhaven Funerals NQ218 Harbour Road, Mackay Harbour QLD, Australia · (07) 4953 1200 Common questionsWhat is the postcode for Mackay Harbour?Mackay Harbour, QLD has the postcode 4740.What state is Mackay Harbour in?Mackay Harbour is in Queensland (QLD).Does postcode 4740 cover more than one suburb?Yes. Postcode 4740 covers 50 localities, so the postcode alone does not identify Mackay Harbour. Browse other postcodes in Queensland, or widen the search to every Australian postcode.