Winnetka (/wɪˈnɛtkə/) is a village in Cook County, Illinois, United States, located 16 miles (26 km) north of downtown Chicago. The population was 12,187 at the 2010 census. The village is one of the wealthiest places in the nation in terms of household income, and the 2nd richest in Illinois.
Winnetka is located at 42°6′22″N 87°44′16″W / 42.10611°N 87.73778°W / 42.10611; -87.73778 (42.106227, −87.73801). Winnetka is located 650 feet (200 m) above sea level and has a magnetic declination of 3° 10′ W. According to the 2010 census, Winnetka has a total area of 3.893 square miles (10.08 km), of which 3.81 square miles (9.87 km) (or 97.87%) is land and 0.083 square miles (0.21 km) (or 2.13%) is water.
As of the census of 2010, there were 12,187 people, 4,102 households, and 3,328 families residing in the village. The racial makeup of the village was 94.8% White, 0.3% African American, 0.1% Native American, 3.3% Asian, 0.3% from other races, and 1.2% from two or more races. Hispanic or Latino of any race were 2.2% of the population.
There were 4,102 households out of which 45.6% had children under the age of 18 living with them, 74.3% were married couples living together, 5.2% had a female householder with no husband present, and 18.9% were non-families. 17.3% of all households were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.97 and the average family size was 3.39.
In the village, the population was spread out with 36.2% under the age of 19, 2.3% from 20 to 24, 15.2% from 25 to 44, 32.7% from 45 to 64, and 13.5% who were 65 years of age or older. The median age was 42.8 years.
The median income for a household in the village was $207,955, and the median income for a family was over $250,000. The per capita income for the village was $105,575 in 2015. About 1.8% of families and 1.8% of the population were below the poverty line, including 1.6% of those under age 18 and 2.0% of those age 65 or over.