60935 -- U.S. ZIP code Municipality (1990): ESSEX, Illinois All ZIPs for this municipality (1990): 60935 Population (2000): 846 Housing Units (2000): 312 Land area (2000): 18.346521 sq. miles (47.517270 sq. km) Water area (2000): 0.064401 sq. miles (0.166797 sq. km) Total area (2000): 18.410922 sq. miles (47.684067 sq. km) Located within: Illinois (IL) Location: 41.175690 N, 88.172689 W