Key facts
- Country
- United States
- State
- Illinois
- Named after
- Iroquois River
- Seat
- Watseka
- Largest city
- Watseka
- Total
- 1,119 sq mi (2,900 km )
- Land
- 1,117 sq mi (2,890 km )
- Water
- 1.6 sq mi (4.1 km ) 0.1%
- Estimate 2025
- 26,150
- Density
- 24.24/sq mi (9.359/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
Article
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.
History