Prospect Heights is a city located in Cook County Illinois. With a 2020 population of 15,677, it is the 158th largest city in Illinois and the 2255th largest city in the United States . Prospect Heights is currently declining at a rate of -0.67% annually and its population has decreased by -3.56% since the most recent census, which recorded a population of 16,256 in 2010. Prospect Heights reached it's highest population of 17,081 in 2000. Spanning over 4 miles, Prospect Heights has a population density of 3,685 people per square mile.
The average household income in Prospect Heights is $101,792 with a poverty rate of 10.17%. The median rental costs in recent years comes to $1,099 per month, and the median house value is $284,300. The median age in Prospect Heights is 38.2 years, 35.3 years for males, and 41.1 years for females.