Diamond, IL -- U.S. village in Illinois Population (2000): 1393 Housing Units (2000): 597 Land area (2000): 1.582375 sq. miles (4.098332 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.582375 sq. miles (4.098332 sq. km) FIPS code: 19837 Located within: Illinois (IL), FIPS 17 Location: 41.287699 N, 88.253824 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Diamond, IL Diamond