Mackinaw is a village in Tazewell County, Illinois, United States, and is part of the Peoria, Illinois Metropolitan Statistical Area. As of the 2020 census, Mackinaw had a population of 1,879.

Tazewell County is located in the U.S. state of Illinois. According to the 2020 census, it had a population of 131,343. Its county seat and largest city is Pekin.