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1 day ago · Area code. 309. FIPS code. 17-59000. Website. www.peoriagov.org. Peoria (/ piˈɔːriə / pee-OR-ee-ə) is a city in and county seat of Peoria County, Illinois, United States. [4] Located on the Illinois River, the city had a population of 113,150 as of the 2020 census, making it the eighth-most populous city in Illinois. [5][6] It is the ...
