62987 -- U.S. ZIP code Municipality (1990): STONEFORT, Illinois All ZIPs for this municipality (1990): 62987 Population (2000): 997 Housing Units (2000): 480 Land area (2000): 90.471797 sq. miles (234.320869 sq. km) Water area (2000): 1.090129 sq. miles (2.823422 sq. km) Total area (2000): 91.561926 sq. miles (237.144291 sq. km) Located within: Illinois (IL) Location: 37.635792 N, 88.679121 W