60476 -- U.S. ZIP code Municipality (1990): THORNTON, Illinois All ZIPs for this municipality (1990): 60476 Population (2000): 2601 Housing Units (2000): 1040 Land area (2000): 3.383101 sq. miles (8.762192 sq. km) Water area (2000): 0.079885 sq. miles (0.206902 sq. km) Total area (2000): 3.462986 sq. miles (8.969094 sq. km) Located within: Illinois (IL) Location: 41.570384 N, 87.608393 W