Bay -- U.S. County in Michigan Population (2000): 110157 Housing Units (2000): 46423 Land area (2000): 444.245963 sq. miles (1150.591713 sq. km) Water area (2000): 186.659954 sq. miles (483.447041 sq. km) Total area (2000): 630.905917 sq. miles (1634.038754 sq. km) Located within: Michigan (MI), FIPS 26 Location: 43.636656 N, 83.917406 W Headwords: Bay Bay, MI Bay County Bay County, MI