Racial and ethnic composition 2020 census As of the
2020 census, Prospect Heights had a population of 16,058, with 6,303 households and 4,205 families residing in the city. The population density was , and there were 6,657 housing units at an average density of . Of the 6,303 households, 29.6% had children under the age of 18 living in them. 52.7% were married-couple households, 17.4% were households with a male householder and no spouse or partner present, and 24.8% were households with a female householder and no spouse or partner present. About 27.1% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older. The average household size was 3.09 and the average family size was 2.59. 5.3% of housing units were vacant. The homeowner vacancy rate was 1.1% and the rental vacancy rate was 7.6%. ==Education==