West Peoria, IL -- U.S. city in Illinois Population (2000): 4762 Housing Units (2000): 2128 Land area (2000): 1.285731 sq. miles (3.330029 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.285731 sq. miles (3.330029 sq. km) FIPS code: 80736 Located within: Illinois (IL), FIPS 17 Location: 40.697104 N, 89.630998 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: West Peoria, IL West Peoria