
New Trier township
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 15.899
- State:
- Illinois
New Trier township is located in Cook County, Illinois. New Trier township has a 2025 population of 54,577. New Trier township is currently declining at a rate of -0.55% annually and its population has decreased by -4.55% since the most recent census, which recorded a population of 57,178 in 2020.
The average household income in New Trier township is $343,000 with a poverty rate of 3.12%. The median age in New Trier township is 45.1 years: 44.2 years for males, and 46.1 years for females.