62997 -- U.S. ZIP code Municipality (1990): WILLISVILLE, Illinois All ZIPs for this municipality (1990): 62997 Population (2000): 663 Housing Units (2000): 280 Land area (2000): 0.477710 sq. miles (1.237263 sq. km) Water area (2000): 0.010020 sq. miles (0.025952 sq. km) Total area (2000): 0.487730 sq. miles (1.263215 sq. km) Located within: Illinois (IL) Location: 37.983687 N, 89.590506 W