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Allegan County Michigan ☎ 269-673-0205 Last Updated: 01/01/2026 |
| 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. | |