60955 -- U.S. ZIP code Municipality (1990): ONARGA, Illinois All ZIPs for this municipality (1990): 60955 Population (2000): 2045 Housing Units (2000): 751 Land area (2000): 79.178844 sq. miles (205.072257 sq. km) Water area (2000): 0.018285 sq. miles (0.047358 sq. km) Total area (2000): 79.197129 sq. miles (205.119615 sq. km) Located within: Illinois (IL) Location: 40.706634 N, 87.996248 W