Boulder Hill CDP, Illinois Demographics & Population 2026

Population Overview

Boulder Hill CDP is a small city located in Illinois. The total population is 9,127. It ranks as the 240th most populous out of 1,445 cities and towns in Illinois.

Age Demographics

The median age in Boulder Hill CDP is 36.8 years. This is 5% lower than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Boulder Hill CDP is $76,935. This is 6% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 2% lower. The poverty rate stands at 7.0%. This is 41% lower than the state poverty rate of 11.7%. The unemployment rate is 5.2%. This is 10% lower than the state rate of 5.8%. The median home value is $233,100. Housing costs are 7% lower than the state median of $250,500. The home-value-to-income ratio is 3.0x. 83.0% of occupied housing units are owner-occupied. This homeownership rate is 24% higher than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in Boulder Hill CDP is White (non-Hispanic), making up 51.7% of the population. Hispanic or Latino residents account for 42.5%. The Black or African American population (1.5%) is well below the state average of 13.6%. The Hispanic or Latino population is significantly higher than the state average (42.5% vs 18.5%). The Asian population (1.6%) is well below the state average of 5.8%.

Education

17.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 53% 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 87.0%.

Data Sources & Methodology

All demographic data for Boulder Hill CDP, 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.