New Trier Township, Illinois

New Trier Township
Township
Location in Cook County
CountryUnited States
StateIllinois
CountyCook
Established1850
Area
 • Total
16.30 sq mi (42.21 km2)
 • Land16.00 sq mi (41.43 km2)
 • Water0.29 sq mi (0.76 km2)  1.80%
Population
 (2020)
 • Total
57,371
 • Density3,587/sq mi (1,385/km2)
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
FIPS code17-031-52909
Websitewww.newtriertownship.com

New Trier Township (/trɪər/) is one of 29 townships in Cook County, Illinois, United States. As of the 2020 census, its population was 57,371.

The township contains New Trier High School, but the borders of the school district do not line up exactly with the borders of the township.