Mendota, IL -- U.S. city in Illinois Population (2000): 7272 Housing Units (2000): 2939 Land area (2000): 3.779118 sq. miles (9.787871 sq. km) Water area (2000): 0.096225 sq. miles (0.249222 sq. km) Total area (2000): 3.875343 sq. miles (10.037093 sq. km) FIPS code: 48333 Located within: Illinois (IL), FIPS 17 Location: 41.549397 N, 89.118377 W ZIP Codes (1990): 61342 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mendota, IL Mendota