Sangamon County, Illinois Demographics 2026

Population Overview

Sangamon County is located in Illinois with a total population of 195,217. It is the 11th most populous county out of 102 in Illinois.

Age Demographics

The median age in Sangamon County is 40.8 years. This is 5% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Sangamon County is $74,114. This is 9% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 6% lower. The poverty rate stands at 12.9%. This is 10% higher than the state poverty rate of 11.7%. The unemployment rate is 5.5%. This is 6% lower than the state rate of 5.8%. The median home value is $170,300. Housing costs are 32% lower than the state median of $250,500. With a home-value-to-income ratio of just 2.3x, Sangamon County is one of the most affordable housing markets in the area. 70.6% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in Sangamon County is White (non-Hispanic), making up 78.1% of the population. Black or African American residents account for 12.5%. The Hispanic or Latino population (2.8%) is well below the state average of 18.5%. The Asian population (2.1%) is well below the state average of 5.8%.

Education

35.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 6% 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 93.7%.