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Join the roomDeWitt County is a county located in the U.S. state of Illinois. As of the 2020 United States census, the population was 15,516. Its county seat is Clinton. The county was formed as De Witt County on March 1, 1839, from Macon and McLean counties. The county was named in honor of the seventh Governor of New York State, De Witt Clinton.
Not who you're looking for? Others named DeWitt County: county in Texas, United States
