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,…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. This population increased, and in 2024, its estimated to be at 10,401. 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.
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