Chicago Heights is a city in Cook County, Illinois, United States. The population was 30,276 at the 2010 census. Chicago Heights is nicknamed "Crossroads of the Nation".
Chicago Heights is located at 41°30′43″N 87°38′25″W. The city lies on the high land of the Tinley Moraine, with the higher and older Valparaiso Moraine lying just to the south of the city.
According to the 2010 census, Chicago Heights has a total area of 10.083 square miles (26.11 km2), of which 10.07 square miles (26.08 km2) (or 99.87%) is land and 0.013 square miles (0.03 km2) (or 0.13%) is water.
The city's major crossroads are at Dixie Highway (Illinois Route 1) and Lincoln Highway (U.S. Route 30).
Chicago Heights is about 30 miles (48 km) south of the Chicago Loop.