Prospect Heights city, Illinois Demographics & Population 2026

Population Overview

Prospect Heights city is a small city located in Illinois. The total population is 15,681. It ranks as the 159th most populous out of 1,445 cities and towns in Illinois.

Age Demographics

The median age in Prospect Heights city is 41.0 years. This is 5% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Prospect Heights city is $91,599. This is 12% higher than the state median of $81,702. Compared to the national median of $78,538, household income here is 17% higher. The poverty rate stands at 5.9%. This is 50% lower than the state poverty rate of 11.7%. The unemployment rate is 4.4%. This is 25% lower than the state rate of 5.8%. The median home value is $347,500. Housing costs are 39% higher than the state median of $250,500. The home-value-to-income ratio is 3.8x. 63.5% of occupied housing units are owner-occupied. This homeownership rate is 5% lower than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in Prospect Heights city is White (non-Hispanic), making up 55.0% of the population. Hispanic or Latino residents account for 35.5%. The Black or African American population (0.4%) is well below the state average of 13.6%. The Hispanic or Latino population is significantly higher than the state average (35.5% vs 18.5%).

Education

36.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 2% 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 83.8%.

Data Sources & Methodology

All demographic data for Prospect Heights city, 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.