Monroe County, Michigan Monroe County, Michigan Monroe County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 152,021. The largest city and county seat is Monroe. The county was established as the second county (after Wayne County) in the Michigan Territory in 1817 and was named for then-President James Monroe. Monroe County comprises the Monroe, MI Micropolitan Statistical Area and is included in the Detroit-Warren-Ann Arbor, MI Combined Statistical Area. It is also considered a northerly extension of the Toledo Metropolitan Area. Before the county's formation, the primary settlement was Frenchtown, which was settled
Monroe, Michigan of Monroe in honor of President James Monroe. He visited the Michigan Territory in 1817. In the same year, the city of Monroe was named as the county seat of the newly created Monroe County. Monroe was re-incorporated as a city in 1837. Settled mostly by American migrants from New York and New England, Monroe later became associated with events in the West in the later 19th century, particularly the Indian Wars. It is known as the childhood home of George Armstrong Custer (1839–1876), who had a military career in which he reached the rank of Major General. His family