Barry County is a county in the U.S. state of Michigan. As of the 2010 census, the population was 59,173. The county seat is Hastings. The county was formed by an act of the legislature of the Michigan Territory on April 29, 1829 and organized in 1839. It was named for William Taylor Barry, United States Postmaster General under President Andrew Jackson, making it one of Michigan's "cabinet counties".Barry County is part of the Grand Rapids-Wyoming, MI Metropolitan Statistical Area.