Rio, IL -- U.S. village in Illinois Population (2000): 240 Housing Units (2000): 101 Land area (2000): 0.325366 sq. miles (0.842695 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.325366 sq. miles (0.842695 sq. km) FIPS code: 64148 Located within: Illinois (IL), FIPS 17 Location: 41.110236 N, 90.398996 W ZIP Codes (1990): 61472 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Rio, IL Rio