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Iroquois County, IL
21 cities and towns and 23 ZIP codes in Iroquois County, Illinois.
Population
26,449
Land area
1,117sq mi
People per sq mi
24
ZIP codes
23
Cities and towns in Iroquois County
Iroquois County at a glance
- Iroquois County is 90% less dense than Illinois as a whole.
- The median household income is $66,255, 21% below the Illinois median of $83,390.
- A typical owner-occupied home is valued at $137,800 (48% below Illinois) and median rent is $799 a month.
- Its largest cities are Watseka (4,780), Gilman (1,612) and Onarga (1,430).
Local data for Iroquois County, IL
Counts from official public data
Housing and community stats
Iroquois County, IL, American Community Survey 2020-2024
Median household income
$66,255
Poverty rate
12.5%
Median home value
$137,800
Prices +7.4% in a year
Median rent
$799/mo
Homeownership
80.0%
Bachelor's or higher
18.2%
Median age
44.4
Average commute
25.0 min
Largest reported origins and ancestries: German Americans (8,735), Irish Americans (3,526), Mexican Americans (1,940).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.9%
Aug 2026, -0.9 pts in a year
Average annual pay
$51,637
7,015 jobs, 2025
Income per person
$59,524
BEA, 2024
Federal spending
$215M
FY 2026, $7,925 per person
PPP loans
$70.16M
1,956 loans, 7,706 jobs reported
Campaign donations
$44.69K
Itemized, 2026 cycle
How people get to work
Iroquois County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone81.1%
- Carpooled7.2%
- Public transit0.2%
- Walked2.0%
- Bicycle0.2%
- Taxi, ride-hailing, motorcycle or other1.7%
- Worked from home7.6%
Average one-way commute: 25.0 minutes for people who do not work from home.
Environment and hazard risk
Iroquois County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: cold wave
Storm events since 1996
483
Most often thunderstorm wind
Flood insurance policies
255
2.0% of homes, county
July high / Jan low
85° / 16°F
38.4 inches of rain a year
Hazards, floods and storm historyCheck a flood zone4 historic places
Health statistics
Share of adults in Iroquois County, IL, CDC PLACES estimates
Obesity
40.6%
U.S. 33.3% +7.3 pts
Diabetes
13.9%
U.S. 12.1% +1.8 pts
Smoking
16.4%
U.S. 12.8% +3.6 pts
Uninsured (18-64)
9.6%
U.S. 11.1% -1.5 pts
Cities, towns and ZIP codes in Iroquois County
Population shown
Frequently asked questions
- What is the largest city in Iroquois County, IL?
- Watseka is the largest city or town in Iroquois County, with about 4,780 residents.
- How many ZIP codes are in Iroquois County?
- Iroquois County includes 23 ZIP Code Tabulation Areas, including 60911, 60912, 60918, 60924, 60926.
- What is the population of Iroquois County, IL?
- About 26,449 people live in Iroquois County, based on American Community Survey 5-year estimates.
- What counties border Iroquois County?
- Iroquois County borders Kankakee County, Vermilion County, Newton County, IN, Ford County, Benton County, IN.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023