Silvis, IL -- U.S. city in Illinois Population (2000): 7269 Housing Units (2000): 3135 Land area (2000): 3.645762 sq. miles (9.442480 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.645762 sq. miles (9.442480 sq. km) FIPS code: 69979 Located within: Illinois (IL), FIPS 17 Location: 41.503034 N, 90.413324 W ZIP Codes (1990): 61282 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Silvis, IL Silvis