LaSalle County, Illinois Demographics 2026

Population Overview

LaSalle County is located in Illinois with a total population of 109,049. It is the 17th most populous county out of 102 in Illinois.

Age Demographics

The median age in LaSalle County is 42.1 years. This is 8% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in LaSalle County is $72,281. This is 12% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 8% lower. The poverty rate stands at 13.5%. This is 15% higher than the state poverty rate of 11.7%. The unemployment rate is 5.7%. This is 2% lower than the state rate of 5.8%. The median home value is $154,900. Housing costs are 38% lower than the state median of $250,500. With a home-value-to-income ratio of just 2.1x, LaSalle County is one of the most affordable housing markets in the area. 73.9% of occupied housing units are owner-occupied. This homeownership rate is 11% higher than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in LaSalle County is White (non-Hispanic), making up 83.0% of the population. Hispanic or Latino residents account for 10.8%. The Black or African American population (2.6%) is well below the state average of 13.6%. The Asian population (0.9%) is well below the state average of 5.8%.

Education

18.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 50% 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 91.4%.