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Richland County

County in Illinois
Richland County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 15,813. Its county seat is Olney. Wikipedia
Cities: Olney, Noble, Claremont, and more
County seat: Olney
Population: 15,435 (2022)
Congressional district: 12th