Milan is a city in Monroe and Washtenaw counties in the U.S. state of Michigan. The population was 5,836 at the 2010 census. About 60% of the city's area and 75% of its residents are located on the Washtenaw County side adjacent to York Charter Township in Washtenaw County; while 40% percent of the city's area and 25% of its residents are located on the Monroe County side adjacent to Milan Township.