60040 -- U.S. ZIP code Municipality (1990): HIGHWOOD, Illinois All ZIPs for this municipality (1990): 60040 Population (2000): 5645 Housing Units (2000): 1965 Land area (2000): 0.746489 sq. miles (1.933398 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.746489 sq. miles (1.933398 sq. km) Located within: Illinois (IL) Location: 42.205724 N, 87.814216 W