62664 -- U.S. ZIP code Municipality (1990): LUTHER, Illinois All ZIPs for this municipality (1990): 62664 Population (2000): 3338 Housing Units (2000): 1439 Land area (2000): 116.064840 sq. miles (300.606543 sq. km) Water area (2000): 0.223417 sq. miles (0.578648 sq. km) Total area (2000): 116.288257 sq. miles (301.185191 sq. km) Located within: Illinois (IL) Location: 40.200537 N, 89.704279 W