Chadwick, IL -- U.S. village in Illinois Population (2000): 505 Housing Units (2000): 228 Land area (2000): 0.316519 sq. miles (0.819780 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.316519 sq. miles (0.819780 sq. km) FIPS code: 12294 Located within: Illinois (IL), FIPS 17 Location: 42.014081 N, 89.889078 W ZIP Codes (1990): 61014 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Chadwick, IL Chadwick