
Prospect Heights
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 4.207
- State:
- Illinois
Prospect Heights is a city located in Cook County, Illinois. Prospect Heights has a 2025 population of 14,897. Prospect Heights is currently declining at a rate of -1.44% annually and its population has decreased by -6.83% since the most recent census, which recorded a population of 15,989 in 2020.
The average household income in Prospect Heights is $114,693 with a poverty rate of 5.88%. The median age in Prospect Heights is 41 years: 38.9 years for males, and 41.8 years for females.