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Peoria County Illinois ☎ +1 309-672-6056 Last Updated: 08/23/2026 |
| Peoria County is located in the state of Illinois. According to the 2020 U.S. Census, the county has a population of 181,830. The county seat is the city of Peoria. The county is irrigated by the Spoon River, Kickapoo Creek, Elbow Creek, and Copperas Creek. | |
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