Prospect Heights, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Prospect Heights, Illinois is 15,681 as of the 2023 American Community Survey, making it the 159th-largest city in Illinois. The median household income is $91,599, the median home value is $347,500, and the median age is 41.0.
The population has declined 4.3% since 2010 (16,270 → 15,566).
15,681
Population
3727
People / sq mi
$91,599
Median Income
$347,500
Median Home Value
Prospect Heights covers 4.2 sq mi of land at 3727 people per square mile.
About Prospect Heights, IL
Prospect Heights is a city in Illinois with a population of 15,681. It ranks #159 among cities in Illinois by population. The median age is 41.0, older than the national median. The population is 48.9% male and 51.1% female.
The median household income in Prospect Heights is $91,599, above the US median of $74,580. 2.9% of residents live below the federal poverty level. Home values sit at a median of $347,500, with monthly rent averaging $1,391. The homeownership rate of 63.5% is close to the national rate of 64.8%.
Educational attainment in Prospect Heights reflects 36.3% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 16.3% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 26.4 minutes each way.
Prospect Heights city Population History (2010-2024)
The city of Prospect Heights city had a population of 16,270 in 2010 and 15,566 in 2024, a -4.3% growth over 14 years. The peak was 16,432 in 2014. Average annual growth rate: -0.31%.
15,566
Population (2024)
16,270
Population (2010)
16,432
Peak (2014)
-0.31%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 16,270 |
| 2011 | 16,329 |
| 2012 | 16,378 |
| 2013 | 16,412 |
| 2014 | 16,432 |
| 2015 | 16,392 |
| 2016 | 16,288 |
| 2017 | 16,150 |
| 2018 | 15,992 |
| 2019 | 15,887 |
| 2020 | 15,991 |
| 2021 | 15,708 |
| 2022 | 15,507 |
| 2023 | 15,459 |
| 2024 | 15,566 |
Race & Ethnicity
| White | 62.2% |
| Black or African American | 0.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.0% |
| Two or More Races | 0.0% |
Economy & Income
$91,599
Median Household Income
$46,868
Per Capita Income
2.9%
Poverty Rate
3.2%
Unemployment Rate
Housing
$347,500
Median Home Value
$1,391
Median Rent
63.5%
Owner-Occupied
Education
83.8%
High School+
36.3%
Bachelor's+
Commute
1.9%
Drive Alone
70.2%
Public Transit
16.3%
Work From Home
26.4 min
Avg Commute
Community Profile
7.5%
Foreign Born
40.8%
Non-English at Home
3.5%
Veterans
8.6%
With Disability
81.6%
Health Insurance
94.9%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 18.7% |
| Manufacturing | 18.1% |
| Finance, Insurance & Real Estate | 17.8% |
| Construction | 6.7% |
| Education, Health Care & Social Services | 6.6% |
| Retail Trade | 6.3% |
| Arts, Entertainment & Food Services | 5.0% |
| Information | 3.9% |
| Transportation & Warehousing | 3.0% |
| Public Administration | 1.6% |
Largest cities in Illinois
Largest counties in Illinois
Part of Illinois
Metro areas in Illinois
City rankings
Frequently Asked Questions
Prospect Heights, Illinois has a population of 15,681 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 159th-largest city in Illinois.
The median household income in Prospect Heights, Illinois is $91,599, with 2.9% of residents living below the federal poverty level.
The median home value in Prospect Heights, Illinois is $347,500, with median monthly rent at $1,391 and a homeownership rate of 63.5%.
The median age in Prospect Heights, Illinois is 41.0 years. The population is 48.9% male and 51.1% female.
The population has declined 4.3% since 2010 (16,270 → 15,566).
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.