Mendota is a city in LaSalle County, Illinois, United States, in the state's north-central region. The population was 7,372 at the 2010 census, and was estimated to be 7,057 by July 2018. It is part of the Ottawa, IL Micropolitan Statistical Area. Mendota is located approximately 85 miles west of Chicago, 70 miles east of Moline and 55 miles south of Rockford. The current mayor is David W. Boelk, an independent elected to a four-year term.
Mendota was founded in 1853. The name "Mendota" is derived from a Lakota word meaning "junction of two trails", which was found appropriate for the city since there was a nearby railroad junction.
According to the 2010 census, Mendota has a total area of 5.096 square miles (13.20 km2), of which 5 square miles (12.95 km2) (or 98.12%) is land and 0.096 square miles (0.25 km2) (or 1.88%) is water.
As of the 2010 census there were 7,372 people and 2,826 households residing in the city. The population density was 1,475.9 people per square mile (569.8/km²). There were 3,037 housing units at an average density of 607.4 per square mile (233.6/km²). The racial makeup of the city was 88.3% White, 0.7% African American, 0.3% Native American, 0.5% Asian, 8.5% from other races, and 1.7% from two or more races.