60451 -- U.S. ZIP code Municipality (1990): NEW LENOX, Illinois All ZIPs for this municipality (1990): 60451 Population (2000): 27338 Housing Units (2000): 9121 Land area (2000): 27.320338 sq. miles (70.759347 sq. km) Water area (2000): 0.058309 sq. miles (0.151019 sq. km) Total area (2000): 27.378647 sq. miles (70.910366 sq. km) Located within: Illinois (IL) Location: 41.509231 N, 87.964755 W