61866 -- U.S. ZIP code Municipality (1990): RANTOUL, Illinois All ZIPs for this municipality (1990): 61866 61868 Population (2000): 14201 Housing Units (2000): 6788 Land area (2000): 74.047255 sq. miles (191.781502 sq. km) Water area (2000): 0.112912 sq. miles (0.292440 sq. km) Total area (2000): 74.160167 sq. miles (192.073942 sq. km) Located within: Illinois (IL) Location: 40.307065 N, 88.155753 W