Iroquois County, Illinois Demographics 2026

Population Overview

Iroquois County is located in Illinois with a total population of 26,746. It is the 51st most populous county out of 102 in Illinois.

Age Demographics

The median age in Iroquois County is 44.4 years. This is 14% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Iroquois County is $62,439. This is 24% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 20% lower. The poverty rate stands at 13.4%. This is 14% higher than the state poverty rate of 11.7%. The unemployment rate is 4.8%. This is 17% lower than the state rate of 5.8%. The median home value is $125,400. Housing costs are 50% lower than the state median of $250,500. With a home-value-to-income ratio of just 2.0x, Iroquois County is one of the most affordable housing markets in the area. 78.5% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 66.8%.

Race & Ethnicity

Iroquois County has a predominantly White (non-Hispanic) population, comprising 87.8% of all residents. Hispanic or Latino residents account for 8.0%. The Black or African American population (0.7%) is well below the state average of 13.6%. The Hispanic or Latino population (8.0%) is well below the state average of 18.5%. The Asian population (0.4%) is well below the state average of 5.8%.

Education

16.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 55% lower than the state rate of 37.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 89.1%.