Iroquois County, Illinois

Iroquois County
Old Iroquois County Courthouse
Map of Illinois highlighting Iroquois County
Location within the U.S. state of Illinois
Map of the United States highlighting 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 forIroquois River
SeatWatseka
Largest cityWatseka
Area
 • Total1,119 sq mi (2,900 km2)
 • Land1,117 sq mi (2,890 km2)
 • Water1.6 sq mi (4 km2)  0.1%
Population
 (2020)
 • Total27,077
 • Estimate 
(2023)
26,136 Decrease
 • 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.[1] It is the only county in the United States named Iroquois.[2] The county seat is Watseka.[3] The county is located along the border with Indiana.

  1. ^ "U.S. Census Bureau QuickFacts: Iroquois County, Illinois".
  2. ^ Cite error: The named reference Dowling 1968, p. 9 was invoked but never defined (see the help page).
  3. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.