Chesterfield, Illinois Demographics & Population 2026

A note before these figures: with a population of 201, Chesterfield'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

Chesterfield is a small community located in Illinois, within Macoupin County. The total population is 201. It ranks as the 1204th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Chesterfield is 33.7 years. This is 14% lower than the state median of 39.0 years. With 29.3% of the population under 18, Chesterfield has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Chesterfield is $60,000. This is 28% lower than the state median of $83,390. It is also 26% lower than the national median of $80,734. The poverty rate stands at 20.4%. This is 73% higher than the state poverty rate of 11.8%. 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 8.2%. This is 41% higher than the state rate of 5.8%. The median home value is $86,000. Housing costs are 67% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.4x, Chesterfield is one of the most affordable housing markets in the area. 97.1% of occupied housing units are owner-occupied. This homeownership rate is 45% higher than the state average of 67.1%.

Race & Ethnicity

Every resident counted in Chesterfield was recorded as White (non-Hispanic). A figure of exactly 99.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

19.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 49% 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 83.7%.

Data Sources & Methodology

All demographic data for Chesterfield, 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.