DuPage County, Illinois Demographics 2026

Population Overview

DuPage County is located in Illinois with a total population of 927,263. It is the 2nd most populous county out of 102 in Illinois. The county encompasses 3 Census-designated places.

Age Demographics

The median age in DuPage County is 40.0 years. This is 3% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in DuPage County is $110,502. This is 35% higher than the state median of $81,702. Compared to the national median of $78,538, household income here is 41% higher. The poverty rate stands at 6.4%. This is 45% lower 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 $374,100. Housing costs are 49% higher than the state median of $250,500. The home-value-to-income ratio is 3.4x. 73.1% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in DuPage County is White (non-Hispanic), making up 63.1% of the population. Hispanic or Latino residents account for 15.7%. The Black or African American population (4.9%) is well below the state average of 13.6%. The Asian population is significantly higher than the state average (12.6% vs 5.8%).

Education

51.4% of residents aged 25 and older hold a bachelor's degree or higher. This places DuPage County in the top 10% of all cities in the state for educational attainment. This is 38% higher 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 93.2%. Notably, 21.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.