Markham. He brought with him six seedlings from the Black Forest of Germany and planted them along the Indian Boundary Line. This "Lone Pine Tree" was adopted as the official city symbol in 1985. The lone survivor of six pine trees brought from the Black Forest in 1860 died in 1986. The Markham City Council appropriated money to get a replacement tree from the Black Forest, which the Markham Garden Club planted that year. Demographics As of the 2020 census there were 11,661 people, 3,832 households, and 2,821 families residing in the city. The population density was . There were 4,283 housing units at an average density of . The racial makeup of the city was 72.93% African American, 8.88% White, 0.91% Asian, 0.39% Native American, 10.26% from other races, and 6.64% from two or more races. Hispanic or Latino of any race were 17.27% of the population. There were 3,832 households, out of which 73.36% had children under the age of 18 living with them, 28.42% were married couples living together, 37.42% had a female householder with no husband present, and 26.38% were non-families. 23.12% of all households were made up of individuals, and 10.15% had someone living alone who was 65 years of age or older. The average household size was 3.84 and the average family size was 3.23. The city's age distribution consisted of 31.2% under the age of 18, 9.5% from 18 to 24, 24.3% from 25 to 44, 21.4% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 32.0 years. For every 100 females, there were 87.3 males. For every 100 females age 18 and over, there were 73.8 males. The median income for a household in the city was $42,050, and the median income for a family was $45,880. Males had a median income of $28,214 versus $29,815 for females. The per capita income for the city was $19,580. About 17.4% of families and 20.9% of the population were below the poverty line, including 37.6% of those under age 18 and 14.8% 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. Government Markham is divided between two congressional districts. Most of the city is in Illinois's 2nd