Union Hill, Illinois Demographics & Population 2026

A note before these figures: with a population of 73, Union 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

Union Hill is a small community located in Illinois, within Kankakee County. The total population is 73. It ranks as the 1369th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Union Hill is 42.8 years. This is 10% higher than the state median of 39.0 years. With 35.6% of the population under 18, Union Hill has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Union Hill is $112,500. This is 35% higher than the state median of $83,390. It is also 39% higher than the national median of $80,734. The poverty rate stands at 2.8%. This is 76% 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 Union Hill, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $158,300. Housing costs are 40% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.4x, Union Hill is one of the most affordable housing markets in the area. 85.7% of occupied housing units are owner-occupied. This homeownership rate is 28% higher than the state average of 67.1%.

Race & Ethnicity

The largest racial or ethnic group in Union Hill is White (non-Hispanic), making up 68.5% of the population. Hispanic or Latino residents account for 23.3%.

Education

39.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 3% higher 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 95.7%. Notably, 23.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Union 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.