
Westchester
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 3.686
- State:
- Illinois
Westchester is a village located in Cook County, Illinois. Westchester has a 2025 population of 15,603. Westchester is currently declining at a rate of -1.55% annually and its population has decreased by -7.29% since the most recent census, which recorded a population of 16,830 in 2020.
The average household income in Westchester is $122,769 with a poverty rate of 4.54%. The median age in Westchester is 52.9 years: 51.5 years for males, and 53.7 years for females.