Westchester is a city located in Cook County Illinois. With a 2020 population of 15,851, it is the 157th largest city in Illinois and the 2241st largest city in the United States . Westchester is currently declining at a rate of -0.83% annually and its population has decreased by -5.19% since the most recent census, which recorded a population of 16,718 in 2010. Westchester reached it's highest population of 20,033 in 1970. Spanning over 4 miles, Westchester has a population density of 4,301 people per square mile.
The average household income in Westchester is $95,501 with a poverty rate of 4.93%. The median rental costs in recent years comes to $1,431 per month, and the median house value is $241,100. The median age in Westchester is 46 years, 44.5 years for males, and 47.7 years for females.