|Iroquois County Illinois Cities/Towns - Ashkum, Beaverville, Buckley, Chebanse, Cissna Park, Clifton, Crescent City, Danforth, Donovan, Gilman, Iroquois, Loda, Martinton, Milford, Onarga, Papineau, Sheldon, Thawville, Watseka (County Seat), Wellington, Woodland
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Iroquois County is a county located in the U.S. state of Illinois. As of 2016, the population was 28,334. Its county seat is Watseka.
Iroquois County was formed in 1833. It was named for the Iroquois people.