| Official Name: | Barrington Township |
| Image Map1: | Map of Illinois highlighting Cook County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Cook County's location in Illinois |
| Subdivision Name: | United States |
| Leader Title: | Supervisor |
| Leader Name: | Amy P. Nykaza |
| Leader Title1: | Town Clerk |
| Leader Name1: | D. Robert Alberding |
| Leader Title2: | Assessor |
| Leader Name2: | Jacqueline Stephens |
| Leader Title3: | Tax Collector |
| Leader Name3: | Linda Post |
| Leader Title4: | Trustees |
| Leader Name4: | Robert Collins Daniel P. Fitzgerald Fritz Gohl Linda Post |
| Area Total Km2: | 93.3 |
| Area Land Km2: | 90.2 |
| Area Water Km2: | 3.0 |
| Area Water Percent: | 3.26 |
| Population Total: | 16514 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Elevation M: | 269 |
| Elevation Ft: | 883 |
| Coordinates: | 42.1114°N -88.1794°W |
| Utc Offset: | -6 |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 60010, 60118, 60192, 60195 |
| Blank Info: | 17-031-03831 |
| Unit Pref: | Imperial |
Barrington Township is one of 29 townships in Cook County, Illinois, USA. As of the 2020 census, its population was 16,514 and it contained 6,172 housing units.[1] This population increased, and in 2024, its estimated to be at 10,401.[2] The northwestern corner of the Cook County panhandle, it is the county's northwesternmost township. It is also by far the least densely populated township in the county, with less than half the population density of the next least Lemont Township.
Barrington Township was named after the town of Great Barrington, Massachusetts.[3] It was incorporated in 1865.[4]
According to the United States Census Bureau, Barrington Township covers an area of 93.3sqkm; of this, 90.2sqkm is land and 3sqkm (3.26 percent) is water.[5]
The township contains two historic cemeteries: Barrington Center and Union.
As of the 2020 census there were 16,514 people, 5,456 households, and 4,718 families residing in the township. The population density was 458.34PD/sqmi. There were 6,172 housing units at an average density of 171.3/mi2. The racial makeup of the township was 69.20% White, 0.85% African American, 0.09% Native American, 22.83% Asian, 0.00% Pacific Islander, 1.68% from other races, and 5.34% from two or more races. Hispanic or Latino of any race were 5.30% of the population.
There were 5,456 households, out of which 39.40% had children under the age of 18 living with them, 73.20% were married couples living together, 10.85% had a female householder with no spouse present, and 13.53% were non-families. 11.90% of all households were made up of individuals, and 6.20% had someone living alone who was 65 years of age or older. The average household size was 2.89 and the average family size was 3.12.
The township's age distribution consisted of 26.9% under the age of 18, 4.3% from 18 to 24, 16.1% from 25 to 44, 32.6% from 45 to 64, and 20.1% who were 65 years of age or older. The median age was 46.8 years. For every 100 females, there were 88.1 males. For every 100 females age 18 and over, there were 85.1 males.
The median income for a household in the township was $145,611, and the median income for a family was $161,684. Males had a median income of $106,099 versus $60,556 for females. The per capita income for the township was $67,213. About 3.6% of families and 5.0% of the population were below the poverty line, including 6.1% of those under age 18 and 6.0% of those age 65 or over.