61546 -- U.S. ZIP code Municipality (1990): MANITO, Illinois All ZIPs for this municipality (1990): 61546 Population (2000): 4402 Housing Units (2000): 1862 Land area (2000): 93.157566 sq. miles (241.276978 sq. km) Water area (2000): 1.928500 sq. miles (4.994793 sq. km) Total area (2000): 95.086066 sq. miles (246.271771 sq. km) Located within: Illinois (IL) Location: 40.442037 N, 89.787972 W