Union Township is a civil township of Grand Traverse County in the U.S. state of Michigan. The population was 514 at the 2020 Census, making it the least populous township in the county. Much of Union Township is protected by the Traverse City Management Unit of the Pere Marquette State Forest.

Grand Traverse County is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 95,238, making it the largest county in Northern Michigan. Its county seat is Traverse City. The county is part of the Traverse City metropolitan area, which also includes neighboring Benzie, Kalkaska, and Leelanau counties.