There are 17 US Post Offices in Jackson County serving a total of 122,114 residents equating to 7,183 residents per post office. It's estimated that approximately 194,908 packages are handled across the 17 county post offices annually. Jackson County is a county located in the U.S. state of Michigan. Its population was 160,248 as of the 2010 Census. The county seat is Jackson. The county was set off in 1829 and organized in 1832. It is named for U.S. President Andrew Jackson and considered to be one of Michigan's \"Cabinet counties\", named for members of Jackson's Cabinet. Jackson County comprises the Jackson, MI Metropolitan Statistical Area. The Jackson County Courthouse was designed by Claire Allen, a prominent southern Michigan architect. Jackson County is also home to the Michigan Whitetail Hall of Fame."