Forreston, IL -- U.S. village in Illinois Population (2000): 1469 Housing Units (2000): 632 Land area (2000): 0.831172 sq. miles (2.152725 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.831172 sq. miles (2.152725 sq. km) FIPS code: 27065 Located within: Illinois (IL), FIPS 17 Location: 42.125700 N, 89.579955 W ZIP Codes (1990): 61030 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Forreston, IL Forreston