The Village of Deerfield is a north shore suburb of Chicago in Lake County, Illinois, United States, approximately 25 miles north of Chicago with a small portion extending into Cook County, Illinois. The population was 18,225 at the 2010 census, a decline of 175 from 2000.
According to the 2010 census, Deerfield has a total area of 5.62 square miles (14.56 km), of which 5.58 square miles (14.45 km) (or 99.29%) is land and 0.04 square miles (0.10 km) (or 0.71%) is water.
As of the census of 2000, there were 18,420 people, 6,420 households, and 5,161 families residing in the village. The population density was 3,359.4 people per square mile (1,297.8/km²). There were 6,518 housing units at an average density of 1,188.7 per square mile (459.2/km²). The racial makeup of the village was 95.88% White, 0.33% African American, 0.04% Native American, 2.52% Asian, 0.02% Pacific Islander, 0.43% from other races, and 0.77% from two or more races. Hispanic or Latino of any race were 1.69% of the population.
There were 6,420 households, out of which 43.9% had children under the age of 18 living with them, 73.0% were married couples living together, 6.0% had a female householder with no husband present, and 19.6% were non-families. 17.8% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.81, and the average family size was 3.21.
In the village, the population was spread out with 30.6% under the age of 18, 3.7% from 18 to 24, 26.8% from 25 to 44, 26.0% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 40 years. For every 100 females, there are 93.3 males. For every 100 females age 18 and over, there were 88.5 males.
The median income for a household in the village was $107,194, and the median income for a family was $118,683. Males had a median income of $90,226 versus $48,450 for females. The per capita income for the village was $50,664. About 1.3% of families and 1.6% of the population were below the poverty line, including 2.1% of those under age 18 and 1.8% of those age 65 or over.
Deerfield Illinois neighborhoods include: Berkley-Linden-Stratford, Briarwood Vista, Deerfield, Deer Run, Ridge Rd/Chestnut Ave, Trinity International, Woodland Park