Barrington Hills is a village located about 40 miles northwest of Chicago in the U.S. state of Illinois. Per the 2020 census, the population was 4,114. It straddles approximately 29 square miles over four counties, Cook, Kane, Lake, and McHenry. The Village of Barrington Hills was incorporated in 1957. The suburban village is included in the greater Barrington area. Many very affluent residents live on large estates and commute to downtown Chicago.