Genesee County is a county in the U.S. state of Michigan. As of the 2020 Census, the population was 406,211, making it the fifth-most populous county in Michigan. The county seat and population center is Flint. Genesee County consists of 33 cities, townships, and villages. It is considered to be a part of the greater Mid Michigan area.

Flint is the largest city and seat of Genesee County, Michigan, United States. Located along the Flint River, 66 miles (106 km) 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 largest 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.