61342 -- U.S. ZIP code Municipality (1990): MENDOTA, Illinois All ZIPs for this municipality (1990): 61342 Population (2000): 9221 Housing Units (2000): 3701 Land area (2000): 103.219688 sq. miles (267.337754 sq. km) Water area (2000): 0.142054 sq. miles (0.367918 sq. km) Total area (2000): 103.361742 sq. miles (267.705672 sq. km) Located within: Illinois (IL) Location: 41.543149 N, 89.106968 W