Riverwoods, IL -- U.S. village in Illinois Population (2000): 3843 Housing Units (2000): 1281 Land area (2000): 3.989303 sq. miles (10.332247 sq. km) Water area (2000): 0.010859 sq. miles (0.028125 sq. km) Total area (2000): 4.000162 sq. miles (10.360372 sq. km) FIPS code: 64538 Located within: Illinois (IL), FIPS 17 Location: 42.171075 N, 87.895943 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Riverwoods, IL Riverwoods