Mackinaw, IL -- U.S. village in Illinois Population (2000): 1452 Housing Units (2000): 608 Land area (2000): 1.254750 sq. miles (3.249787 sq. km) Water area (2000): 0.030029 sq. miles (0.077775 sq. km) Total area (2000): 1.284779 sq. miles (3.327562 sq. km) FIPS code: 45785 Located within: Illinois (IL), FIPS 17 Location: 40.533977 N, 89.358630 W ZIP Codes (1990): 61755 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mackinaw, IL Mackinaw