Iroquois County, Illinois

Iroquois County
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 40°44′N 87°49′W / 40.74°N 87.82°W / 40.74; -87.82
Country United States
State Illinois
Founded1833
Named afterIroquois River
SeatWatseka
Largest cityWatseka
Area
  Total
1,119 sq mi (2,900 km2)
  Land1,117 sq mi (2,890 km2)
  Water1.6 sq mi (4 km2)  0.1%
Population
 (2020)
  Total
27,077
  Estimate 
(2023)
26,136
  Density24/sq mi (9.3/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district2nd
Websitewww.co.iroquois.il.us

Iroquois County is a county located in the northeast part of the U.S. state of Illinois. According to the 2020 United States Census, it has a population of 27,077. It is the only county in the United States named Iroquois. The county seat is Watseka. The county is located along the border with Indiana.