DeWitt County is a county located in the U.S. state of Illinois. As of 2000, the population is 16,798. Its county seat is Clinton.
History
The county was formed in 1839. Its name is in honor of the seventh Governor of New York State, DeWitt Clinton. The U.S. Census Bureau and the USGS list the county's name as De Witt, although the county uses the name DeWitt (no space).