Lake Barrington is a village in Lake County, Illinois, United States. The population was 4,973 at the 2010 census.
Lake Barrington is located at 42°12′45″N 88°10′05″W / 42.21250°N 88.16806°W / 42.21250; -88.16806 (42.2125330, -88.1680526). The village is also situated on the shores of Lake Barrington, which was previously called Indian Lake, located at 42°12′54″N 88°08′49″W / 42.21500°N 88.14694°W / 42.21500; -88.14694.
According to the 2010 census, Lake Barrington has a total area of 6.167 square miles (15.97 km), of which 5.86 square miles (15.18 km) (or 95.02%) is land and 0.307 square miles (0.80 km) (or 4.98%) is water.
As of the census of 2000, there were 4,757 people, 2,039 households, and 1,455 families residing in the village of Lake Barrington. The population density was 891.6 people per square mile (343.9/km²). There were 2,116 housing units at an average density of 396.6 per square mile (153.0/km²). The racial makeup of the village was 97.41% White, 0.42% African American, 0.19% Native American, 1.07% Asian, 0.06% Pacific Islander, 0.15% from other races, and 0.69% from two or more races. Hispanic or Latino of any race were 0.99% of the population.
Of the 2,039 households, 23.7% had children under the age of 18 living with them, 65.8% were married couples living together, 3.9% had a female householder with no husband present, and 28.6% were non-families. 25.6% of all households were made up of individuals and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.80.
In the village, the population was spread out with 20.4% under the age of 18, 3.5% from 18 to 24, 17.7% from 25 to 44, 40.4% from 45 to 64, and 17.9% who were 65 years of age or older. The median age was 49 years. For every 100 females, there were 93.6 males. For every 100 females age 18 and over, there were 89.0 males.
The median income for a household in the village was $106,951, and the median income for a family was $122,473. The per capita income for the village was $63,158. About 1.2% of families and 2.0% of the population were below the poverty line, including 3.4% of those under age 18 and 2.3% of those age 65 or over.