
Niles
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 5.848
- State:
- Illinois
Niles is a village located in Cook County, Illinois. Niles has a 2025 population of 28,661. Niles is currently declining at a rate of -1.46% annually and its population has decreased by -6.92% since the most recent census, which recorded a population of 30,791 in 2020.
The average household income in Niles is $111,205 with a poverty rate of 8.15%. The median age in Niles is 47.6 years: 44.5 years for males, and 51.2 years for females.