Westmont is a village in DuPage County, Illinois, United States. Westmont is a community of 5.03 square miles in area. Westmont had a 2000 population of 24,554, a partial special census was conducted 2007 resulting in a population of 26,211, and the census of 2010 put the population at 24,685. It is located approximately 18 miles (29 km) west of the Chicago Loop in the southeastern portion of DuPage County.
Westmont is located at 41°47′40″N 87°58′35″W / 41.79444°N 87.97639°W / 41.79444; -87.97639 (41.794480, -87.976433). It is bounded on the north by the Village of Oak Brook, on the east by the Village of Clarendon Hills, on the south by the City of Darien and on the west by the Village of Downers Grove. It is nearly wholly within Downers Grove Township.
According to the 2010 census, Westmont has a total area of 5.136 square miles (13.30 km), of which 5.03 square miles (13.03 km) (or 97.94%) is land and 0.106 square miles (0.27 km) (or 2.06%) is water.
As of the special census of 2007, there were 26,211 people, 9,900 households, and 5,979 families residing in the village. The population density was 5,014.4 people per square mile (1,934.8/km²). There were 10,269 housing units at an average density of 2,097.1 per square mile (809.2/km²). The racial makeup of the village was 78.02% White, 5.38% African American, 0.13% Native American, 11.95% Asian, 2.41% from other races, and 2.11% from two or more races. Hispanic or Latino people of any race comprised 6.98% of the population.
There were 9,900 households; 29.1% of these households had children under the age of 18 living with them. 47.1% were married couples living together, 10.4% had a female householder with no husband present, and 39.6% were non-families. 32.5% of all households were made up of individuals and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 3.05.
The population was spread out with 21.9% under the age of 18, 8.3% from 18 to 24, 33.8% from 25 to 44, 20.3% from 45 to 64, and 15.7% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 87.4 males. For every 100 females age 18 and over, there were 82.9 males.
The median income for a household in the village was $51,422, and the median income for a family was $64,472. Males had a median income of $42,909 versus $33,690 for females. The per capita income for the village was $26,394. About 3.8% of families and 5.8% of the population were below the poverty line, including 4.8% of those under age 18 and 8.5% of those age 65 or over.