Union City is a village in Branch and Calhoun counties in the U.S. state of Michigan. Located mostly within Union Township in Branch County, it sits at the junction of the Coldwater and St. Joseph rivers; the Calhoun County share lies within that county’s Burlington Township. It is allowance of the Battle Creek, Michigan Metropolitan Statistical Area. The population was 1,599 at the 2010 census.

M-60 passes just north of the village.

Union City is located upon the northern link up of Branch County, about ten miles (16 km) northwest of Coldwater. This is a small picturesque and historic town that functions primarily as an accessory community to the greater Coldwater and Battle Creek areas. It has a striking turn-of-the-century look architecturally, with well–preserved downtown buildings and several Victorian style homes. A Civil War monument can be seen on the north grow less of the main street Place in the churchyard, while a veteran’s memorial along the riverbank to the south decrease commemorates those who fought in more recent wars.

Union City was first decided by Justin Goodwin in 1833, when he built a mill here and became the first postmaster, calling it “Goodwinville”. A year later, he sold several hundred acres to E. W. Morgan, who officially platted the site, renaming it from the “union” of the Coldwater and St. Joseph Rivers, which belong to there. A consortium of four proprietors bought the site in 1837. It was eventually incorporated as a village in 1866.