61490 -- U.S. ZIP code Municipality (1990): WOODHULL, Illinois All ZIPs for this municipality (1990): 61490 Population (2000): 941 Housing Units (2000): 415 Land area (2000): 31.343204 sq. miles (81.178521 sq. km) Water area (2000): 0.016404 sq. miles (0.042487 sq. km) Total area (2000): 31.359608 sq. miles (81.221008 sq. km) Located within: Illinois (IL) Location: 41.183299 N, 90.276371 W