Hillside is a village in Cook County, Illinois, United States. As of the 2010 census it had a population of 8,157.
Hillside is located at 41°52′29″N 87°54′1″W (41.874797, −87.900372).
According to the 2010 census, Hillside has a total area of 3.18 square miles (8.24 km2), all land.
As of the census of 2010, there were 8,157 people, 2,914 households, and 1,975 families living in the village. The population density was 2,565.1 people per square mile (994.8/km2). There were 3,138 housing units at an average density of 986.8 per square mile (382.7/km2). The racial makeup of the village was 37.7% White, 43.2% African American, 0.3% Native American, 3.3% Asian, 0.04% Pacific Islander, 12.3% some other race, and 3.0% from two or more races. Hispanic or Latino of any race were 27.6% of the population, of which 23.6% of the total population were Mexican.
There were 2,914 households, out of which 35.3% had children under the age of 18 living with them, 41.8% were headed by married couples living together, 18.8% had a female householder with no husband present, and 32.2% were non-families. 28.2% of all households were made up of individuals, and 9.2% were someone living alone who was 65 years of age or older. The average household size was 2.71, and the average family size was 3.35.
In the village, the population was spread out, with 23.4% under the age of 18, 8.9% from 18 to 24, 27.1% from 25 to 44, 27.0% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 38.6 years. For every 100 females, there were 93.5 males.