61472 -- U.S. ZIP code Municipality (1990): RIO, Illinois All ZIPs for this municipality (1990): 61472 Population (2000): 666 Housing Units (2000): 280 Land area (2000): 37.176657 sq. miles (96.287096 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 37.176657 sq. miles (96.287096 sq. km) Located within: Illinois (IL) Location: 41.105401 N, 90.387176 W