mackay-harbour postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Mackay-Harbour Mackay Harbour local listingsThe suburb of Mackay Harbour is located in QLD and has a postcode of 4740. Free mackay harbour business listing! Get the first free listing in mackay harbour! Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.