Iroquois County Population

1840–2026

26,078

2026 projection

3.3% since 2020 (decrease)

010K20K30K40K1840186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Iroquois County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202626,078-720.28%
202526,150-720.27%
202426,222+870.33%
202326,135-2861.08%
202226,421-3491.30%
202126,770-1970.73%
202026,967-1260.47%
201927,093-3571.30%
201827,450-3301.19%
201727,780-3701.31%

Showing 10 of 33 years.

Iroquois County Demographics

44.4median age

Median age

Female45.5 yrs
Male43 yrs

Adults

20,746
5,977 seniors (65+) · 29% of adults14,769 other adults

Sex

Female 50.4% · 13,327Male 49.6% · 13,122

Population by age

MaleFemale85+ years, male: 24485+ years, female: 44180–84 years, male: 32280–84 years, female: 55475–79 years, male: 46275–79 years, female: 53170–74 years, male: 61170–74 years, female: 76465–69 years, male: 1,12265–69 years, female: 92660–64 years, male: 1,13660–64 years, female: 1,14755–59 years, male: 75755–59 years, female: 87650–54 years, male: 77150–54 years, female: 74845–49 years, male: 82245–49 years, female: 74340–44 years, male: 83940–44 years, female: 83635–39 years, male: 63035–39 years, female: 73130–34 years, male: 70130–34 years, female: 65525–29 years, male: 70525–29 years, female: 62620–24 years, male: 78820–24 years, female: 72315–19 years, male: 89115–19 years, female: 76810–14 years, male: 69810–14 years, female: 8135–9 years, male: 8535–9 years, female: 7540–4 years, male: 7700–4 years, female: 69185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 264 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Iroquois County Income

$66,255median household income

Median household income

$66,255

Half of households earn more, half earn less

Median earnings

$46,608

Typical yearly pay for a worker 25 or older.

Poverty rate

12.5%

About 1 in 8 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Iroquois County Marital Status

52% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married52%55%50%
Never married26%31%22%
Divorced13%10%16%
Widowed8%3%12%
Separated<1%1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year