Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 census recorded its population to be 123,851, making it the fifth-most populous city in Michigan. Located on the Huron River, Ann Arbor is the principal city of its metropolitan area, which encompasses all of Washtenaw County and had 372,258 residents in 2020. Ann Arbor is included in the Detroit–Warren–Ann Arbor combined statistical area and the Great Lakes megalopolis.
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