Home Postcode finder QLD Mackay Mackay postcode QLD Mackay is a locality in Queensland covered by postcode 4740. Postcode 4740 State or territory Queensland (QLD) Region Central QLD Add a free Mackay business listing More business listings in Mackay Businesses in MackayA1 Batterypro7 Cemetery Road · (07) 4957 6123Airlie Beach StrippersELITE XXX PROMOTIONS · 0424330119Bankruptcy Mackay1 Sydney Street Mackay QLD · 1300 795 575 Common questionsWhat is the postcode for Mackay?Mackay, QLD has the postcode 4740.What state is Mackay in?Mackay 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. Browse other postcodes in Queensland, or widen the search to every Australian postcode.