Kalamazoo County is a county located in the U.S. state of Michigan. As of 2020, the population was 261,670. The county seat is Kalamazoo.

Kalamazoo is a city in and the county seat of Kalamazoo County, Michigan, United States. At the 2020 census, Kalamazoo had a population of 73,598. It is the principal city of the Kalamazoo–Portage metropolitan area in southwestern Michigan, which had a population of 261,670 in 2020.