Flint is the largest city and seat of Genesee County, Michigan, United States. Located along the Flint River, 66 miles northwest of Detroit, it …Flint is the largest city and seat of Genesee County, Michigan, United States. Located along the Flint River, 66 miles northwest of Detroit, it is a principal city within the region known as Mid Michigan. At the 2020 census, Flint had a population of 81,252, making it the twelfth-most populous city in Michigan. The Flint metropolitan area is located entirely within Genesee County. It is the fourth-largest metropolitan area in Michigan with a population of 406,892 in 2020. The city was incorporated in 1855.