Carbon Hill, Illinois Demographics & Population 2026

A note before these figures: with a population of 441, Carbon Hill's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Carbon Hill is a small community located in Illinois, within Grundy County. The total population is 441. It ranks as the 974th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Carbon Hill is 30.6 years. This is 22% lower than the state median of 39.0 years. With 29.0% of the population under 18, Carbon Hill has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Carbon Hill is $103,125. This is 24% higher than the state median of $83,390. It is also 28% higher than the national median of $80,734. The poverty rate stands at 5.9%. This is 50% lower than the state poverty rate of 11.8%. The unemployment rate is 8.8%. This is 50% higher than the state rate of 5.8%. The median home value is $238,600. Housing costs are 9% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.3x, Carbon Hill is one of the most affordable housing markets in the area. 80.3% of occupied housing units are owner-occupied. This homeownership rate is 20% higher than the state average of 67.1%.

Race & Ethnicity

The largest racial or ethnic group in Carbon Hill is White (non-Hispanic), making up 82.1% of the population. Hispanic or Latino residents account for 15.4%.

Education

8.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 78% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.3%.

Data Sources & Methodology

All demographic data for Carbon Hill, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. 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. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.