62411 -- U.S. ZIP code Municipality (1990): ALTAMONT, Illinois All ZIPs for this municipality (1990): 62411 Population (2000): 4185 Housing Units (2000): 1686 Land area (2000): 81.478479 sq. miles (211.028284 sq. km) Water area (2000): 0.160558 sq. miles (0.415842 sq. km) Total area (2000): 81.639037 sq. miles (211.444126 sq. km) Located within: Illinois (IL) Location: 39.062913 N, 88.739124 W