Peoria is a city located in Peoria County, Illinois, in the United States. It serves as the county seat and is situated along the Illinois River. As of the 2020 census, the city had a population of 113,150, ranking it as the eighth-most populous city in the state of Illinois.
The city functions as the principal hub of the Peoria metropolitan area in Central Illinois. This metropolitan region encompasses six counties: Fulton, Marshall, Peoria, Stark, Tazewell, and Woodford. The combined population of these counties was 402,391 according to 2020 census data.