Allegan County is a county in the state of Michigan. The county had a population of 120,502 in 2020. The county seat is the city of Allegan. The county's geographical location offers a unique setting. With 25 miles of shoreline along Lake Michigan, the county is a popular destination for tourists from Chicago, northern Indiana and Illinois, and most of Lower Michigan.
Allegan is a city and the county seat of Allegan County, Michigan, known for its picturesque Kalamazoo River, historic architecture, and landmarks such as the Second Street Bridge. The city has a population of 5,222 according to the 2020 census.