Irwin, Illinois Demographics & Population 2026

A note before these figures: with a population of 78, Irwin'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

Irwin is a small community located in Illinois, within Kankakee County. The total population is 78. It ranks as the 1365th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Irwin is 38.1 years. This is 2% lower than the state median of 39.0 years. With 29.5% of the population under 18, Irwin has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Irwin is $102,750. This is 23% higher than the state median of $83,390. It is also 27% higher than the national median of $80,734. The poverty rate stands at 3.9%. This is 67% lower than the state poverty rate of 11.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Irwin, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $160,900. Housing costs are 39% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.6x, Irwin is one of the most affordable housing markets in the area. 87.1% of occupied housing units are owner-occupied. This homeownership rate is 30% higher than the state average of 67.1%.

Race & Ethnicity

Irwin has a predominantly White (non-Hispanic) population, comprising 88.5% of all residents. Hispanic or Latino residents account for 11.5%. The White (non-Hispanic) population is significantly higher than the state average (88.5% vs 58.1%).

Education

30.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 20% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for Irwin, 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.