Hammond ( /hæmənd/) is a city in Lake County, Indiana, United States. It is part of the Chicago metropolitan area. The population was 80,830 at the 2010 census.
Hammond is located at 41°36′40″N 87°29′35″W / 41.61111°N 87.49306°W / 41.61111; -87.49306 (41.611185, -87.493080).
According to the United States Census Bureau, the city has a total area of 24.8 square miles (64.3 km²), of which 22.9 square miles (59.3 km²) is land and 2.0 square miles (5.1 km²) (7.85%) is water. The city's elevation above sea level is 176 m – 186 m (577 ft – 610 ft). The city sits within the boundaries of the former Lake Chicago. Most of the city is on sandy soil with a layer of black topsoil that varies from non-existent to several feet (a meter or more) thick. Much of the exposed sand has been removed for purposes such as industrial use to make concrete and glass.