| 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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Your Ad Here Iroquois County is a county located in the U.S. state of Illinois. As of 2000, the population was 31,334. Its county seat is Watseka. History Iroquois County was formed in 1833. It was named for the Iroquois people. ![]() |