
Barrington township
- County:
- Lake County
- County Seat:
- No
- Area (mi²):
- 34.858
- State:
- Illinois
Barrington township is located in Lake County, Illinois. Barrington township has a 2025 population of 15,840. Barrington township is currently declining at a rate of -0.45% annually and its population has decreased by -3.86% since the most recent census, which recorded a population of 16,476 in 2020.
The average household income in Barrington township is $231,520 with a poverty rate of 4.84%. The median age in Barrington township is 46.4 years: 46.7 years for males, and 46 years for females.