Calumet City ( KAL-yuu-MET) is a city in Cook County, Illinois. The population was 37,042 at the 2010 census, a decline of 5.2% from 2000. The ZIP code is 60409.
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.
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.
A landmark and point of pride among Cal City residents is the pair of large water towers painted like the popular "Have a Nice Day" smiley faces which are located on Ring Road near River Oaks Mall, the other State Street near Interstate 94.
Calumet City is located at 41°36′51″N 87°32′47″W (41.614188, −87.546389).
According to the 2010 census, Calumet City has a total area of 7.314 square miles (18.94 km2), of which 7.19 square miles (18.62 km2) (or 98.3%) is land and 0.124 square miles (0.32 km2) (or 1.7%) is water.
As of the 2010 census, there were 37,042 people living in the city. The racial makeup of the city was 20.4% White, 71.9% African American, 1.2% Native American, 0.5% Asian, 0.01% Pacific Islander, 8.1% from other races, with 1.9% from two or more races. Hispanic or Latino of any race were 15.0% of the population, including 13.4% of Mexican descent.
There were 13,978 households (and 9,052 families), out of which 32.1% had children under the age of 18 living with them, 30.8% were husband-wife families, 27.3% had a female householder with no husband present, 6.7% had a male householder with no wife present, and 35.2% were non-families. 38.8% Of all households had individuals under 18 years and 25.9% housed someone 65 years of age or older.