2020 census As of the
2020 census, Westmont had a population of 24,429, with 10,567 households and 6,175 families residing in the village. The population density was , and housing density was . The median age was 40.2 years. 19.4% of residents were under the age of 18 and 19.2% of residents were 65 years of age or older. For every 100 females there were 90.8 males, and for every 100 females age 18 and over there were 87.2 males age 18 and over. Of households, 25.9% had children under the age of 18 living in them. Of all households, 43.7% were married-couple households, 18.6% were households with a male householder and no spouse or partner present, and 31.6% were households with a female householder and no spouse or partner present. About 34.4% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older. There were 11,161 housing units, of which 5.3% were vacant. The homeowner vacancy rate was 1.4% and the rental vacancy rate was 5.6%.
Income and poverty The median income for a household in the village was $69,902, and the median income for a family was $97,583. Males had a median income of $54,184 versus $40,258 for females. The
per capita income for the village was $43,229. About 8.3% of families and 11.3% of the population were below the
poverty line, including 16.0% of those under age 18 and 12.1% of those age 65 or over. ==Economy==