Palos Heights is a city in Cook County, Illinois, United States. It is a southwest suburb of Chicago. Per the 2020 census, the population was 12,068. Geography According to the 2021 census gazetteer files, Palos Heights has a total area of , of which (or 97.47%) is land and (or 2.53%) is water. Demographics 2020 Census As of the 2020 census there were 12,068 people, 4,625 households, and 3,407 families residing in the city. The population density was . There were 5,114 housing units at an average density of . The racial makeup of the city was 90.25% White, 1.91% Asian, 1.67% African American, 0.07% Native American, 1.32% from other races, and 4.78% from two or more races. Hispanic or Latino of any race were 5.35% of the population. There were 4,625 households, out of which 44.24% had children under the age of 18 living with them, 62.46% were married couples living together, 9.04% had a female householder with no husband present, and 26.34% were non-families. 21.75% of all households were made up of individuals, and 15.16% had someone living alone who was 65 years of age or older. The average household size was 2.98 and the average family size was 2.55. The city's age distribution consisted of 17.3% under the age of 18, 7.3% from 18 to 24, 19.2% from 25 to 44, 25.7% from 45 to 64, and 30.4% who were 65 years of age or older. The median age was 51.7 years. For every 100 females, there were 99.0 males. For every 100 females age 18 and over, there were 96.8 males. The median income for a household in the city was $90,995, and the median income for a family was $105,134. Males had a median income of $64,583 versus $44,342 for females. The per capita income for the city was $44,721. About 3.8% of families and 5.7% of the population were below the poverty line, including 8.9% of those under age 18 and 5.3% of those age 65 or over. Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race. 2000 Census As of the 2000 census, there were 11,561 people, 4,123 households, and 3,133 families residing in the city. The population density was 2,978.6 people per square mile (1,150.1/km2). There were 4,268 housing units