Randolph County, Illinois Demographics 2026

Population Overview

Randolph County is located in Illinois with a total population of 30,142. It is the 47th most populous county out of 102 in Illinois.

Age Demographics

The median age in Randolph County is 43.0 years. This is 11% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Randolph County is $68,870. This is 16% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 12% lower. The poverty rate stands at 12.3%. This is 5% higher than the state poverty rate of 11.7%. The unemployment rate is 5.1%. This is 12% lower than the state rate of 5.8%. The median home value is $134,100. Housing costs are 46% lower than the state median of $250,500. With a home-value-to-income ratio of just 1.9x, Randolph County is one of the most affordable housing markets in the area. 76.8% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 66.8%.

Race & Ethnicity

Randolph County has a predominantly White (non-Hispanic) population, comprising 85.8% of all residents. Black or African American residents account for 7.9%. The Hispanic or Latino population (3.6%) is well below the state average of 18.5%. The Asian population (0.6%) is well below the state average of 5.8%.

Education

14.2% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 62% 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 87.9%.