Henry County, Illinois Demographics 2026

Population Overview

Henry County is located in Illinois with a total population of 48,948. It is the 30th most populous county out of 102 in Illinois. The county encompasses 2 Census-designated places.

Age Demographics

The median age in Henry County is 43.4 years. This is 12% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Henry County is $69,912. This is 14% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 11% lower. The poverty rate stands at 8.1%. This is 31% lower than the state poverty rate of 11.7%. The unemployment rate is 4.0%. This is 31% lower than the state rate of 5.8%. The median home value is $145,300. Housing costs are 42% lower than the state median of $250,500. With a home-value-to-income ratio of just 2.1x, Henry County is one of the most affordable housing markets in the area. 80.4% of occupied housing units are owner-occupied. This homeownership rate is 20% higher than the state average of 66.8%.

Race & Ethnicity

Henry County has a predominantly White (non-Hispanic) population, comprising 87.3% of all residents. Hispanic or Latino residents account for 6.7%. The Black or African American population (2.1%) is well below the state average of 13.6%. The Hispanic or Latino population (6.7%) is well below the state average of 18.5%. The Asian population (0.4%) is well below the state average of 5.8%.

Education

24.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 35% 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 92.1%.