There are 9 US Post Offices in Barry County serving a total of 49,279 residents equating to 5,475 residents per post office. It's estimated that approximately 78,655 packages are handled across the 9 county post offices annually. 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\". There was once several railroads that went through the county. The main schools are Hastings elementary, middle and high schools; Delton with its elementary, middle and high schools; and Middleville with its elementary, middle and high schools. Barry County is part of the Grand Rapids-Wyoming, MI Metropolitan Statistical Area."