Centralia city, Illinois Demographics & Population 2026

Population Overview

Centralia city is a small city located in Illinois. The total population is 12,009. It ranks as the 198th most populous out of 1,445 cities and towns in Illinois.

Age Demographics

The median age in Centralia city is 40.0 years. This is 3% higher than the state median of 38.9 years. 10.8% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Centralia city is $47,308. This is 42% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 40% lower. The poverty rate stands at 22.6%. This is 93% higher than the state poverty rate of 11.7%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 10.6%. This is 83% higher than the state rate of 5.8%. The median home value is $81,600. Housing costs are 67% lower than the state median of $250,500. With a home-value-to-income ratio of just 1.7x, Centralia city is one of the most affordable housing markets in the area. 64.2% of occupied housing units are owner-occupied. This homeownership rate is 4% lower than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in Centralia city is White (non-Hispanic), making up 80.5% of the population. Black or African American residents account for 9.6%. The Hispanic or Latino population (3.9%) is well below the state average of 18.5%. The Asian population (1.6%) is well below the state average of 5.8%.

Education

17.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 52% 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 89.0%.

Data Sources & Methodology

All demographic data for Centralia city, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. For official data, visit data.census.gov.