Calumet City ( ) is a city in Cook County, Illinois, United States. The population was 36,033 at the 2020 census, a decline of 2.7% from 37,042 in 2010. The ZIP code is 60409. Etymology The word Calumet is the Miꞌkmaq and French word for a Ceremonial pipe as used by Native Americans. History Calumet City (commonly referred to locally as "Cal City") was founded in 1893 when the villages of Schrumville and Sobieski Park merged under the name of West Hammond, since it lies on the west side of the Illinois-Indiana line from Hammond, Indiana. In 1924, West Hammond officially became Calumet City after its citizens voted to change the name in 1923. Geography According to the 2021 census gazetteer files, Calumet City has a total area of , of which (or 98.31%) is land and (or 1.69%) is water. Surrounding areas In addition to being bordered to the east by Hammond, it is also bordered by Burnham and Chicago to the north, Lansing to the south, and South Holland and Dolton to the west. Chicago / Burnham Dolton Hammond Dolton / South Holland Hammond South Holland Munster Lansing Demographics As of the 2020 census there were 36,033 people, 14,166 households, and 8,607 families residing in the city. The population density was . There were 16,196 housing units at an average density of . The racial makeup of the city was 72.64% African American, 9.74% White, 0.65% Native American, 0.19% Asian, 0.04% Pacific Islander, 10.44% from other races, and 6.30% from two or more races. Hispanic or Latino of any race were 17.97% of the population. There were 14,166 households, out of which 49.14% had children under the age of 18 living with them, 26.65% were married couples living together, 26.42% had a female householder with no husband present, and 39.24% were non-families. 36.79% of all households were made up of individuals, and 16.50% had someone living alone who was 65 years of age or older. The average household size was 3.38 and the average family size was 2.56. The city's age distribution consisted of 23.5% under the age of 18, 11.0% from 18 to 24, 26.1% from 25 to 44, 26% from 45 to 64, and 13.5% who were 65 years of age or older. The median age was 36.9 years. For every 100 females, there were 81.9 males. For every 100 females age 18 and over, there