Mackay is a city in the Mackay Region on the eastern or Coral Sea coast of Queensland, Australia. It is located about 970 kilometres (603 mi) north of Brisbane, on the Pioneer River. Mackay is described as being in either Central Queensland or North Queensland, as these regions are not precisely defined. More generally, the area is known as the Mackay–Whitsunday Region. Nicknames of Mackay include the Sugar capital, Alexandra and Macktown. The demonym of Mackay residents is Mackayites.

Mackay Harbour is a coastal mixed-use locality in the Mackay Region, Queensland, Australia. In the 2021 census, Mackay Harbour had a population of 686 people.