Mason -- U.S. County in Michigan Population (2000): 28274 Housing Units (2000): 16063 Land area (2000): 495.167402 sq. miles (1282.477630 sq. km) Water area (2000): 746.697245 sq. miles (1933.936905 sq. km) Total area (2000): 1241.864647 sq. miles (3216.414535 sq. km) Located within: Michigan (MI), FIPS 26 Location: 43.984111 N, 86.305178 W Headwords: Mason Mason, MI Mason County Mason County, MI