Grand Tower, IL -- U.S. city in Illinois Population (2000): 624 Housing Units (2000): 309 Land area (2000): 1.258012 sq. miles (3.258236 sq. km) Water area (2000): 0.001723 sq. miles (0.004463 sq. km) Total area (2000): 1.259735 sq. miles (3.262699 sq. km) FIPS code: 30770 Located within: Illinois (IL), FIPS 17 Location: 37.632599 N, 89.501944 W ZIP Codes (1990): 62942 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Grand Tower, IL Grand Tower