61739 -- U.S. ZIP code Municipality (1990): FAIRBURY, Illinois All ZIPs for this municipality (1990): 61739 Population (2000): 4868 Housing Units (2000): 1913 Land area (2000): 101.711970 sq. miles (263.432782 sq. km) Water area (2000): 0.203990 sq. miles (0.528331 sq. km) Total area (2000): 101.915960 sq. miles (263.961113 sq. km) Located within: Illinois (IL) Location: 40.741158 N, 88.515465 W