861 Area Code 🌍☎️

Peoria is a city in and the county seat of Peoria County, Illinois, United States, and the largest city on the Illinois River. Established in 1691 by the French explorer Henri de Tonti, Peoria is the oldest European settlement in Illinois, and is named after the Peoria tribe. As of the 2010 census, the city was the seventh-most populated in Illinois (and the third largest outside of the Chicago metropolitan area), with a population of 115,007. The Peoria Metropolitan Statistical Area had a population of 373,590 in 2011. Peoria had a population of 118,943 in 2010, when far northern Peoria was also included. Peoria is, until later in 2017 when a move of some executive and support staff (in the end, about 300) to Chicago will begin, the global and national headquarters for Caterpillar Inc., one of the 30 companies composing the Dow Jones Industrial Average, and listed on the Fortune 100. Around 12,000 jobs will still remain in the Peoria area.