to
Update
is a city in DuPage County, Illinois, USA. The population was 22,860 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 6.1 square miles (15.9 km²), of which, 6.0 square miles (15.6 km²) is land and 0.1 square miles (0.2 km²) (1.14%) is water. Darien's City Hall used to be totally underground until 1994, when it was lifted up. Now only 75% is underground. Darien's City Hall is surrounded on three sides by the village of Downers Grove.