La Grange, a suburb of Chicago, is a village in Cook County, in the U.S. state of Illinois.The population was 15,550 at the 2010 census.
The area around La Grange was first settled in the 1830s, when Chicago residents moved out to the west due to the rapid population increase in the city in the decade since its incorporation. The first settler, Robert Leitch, came to the area in 1830, seven years before the City of Chicago was incorporated. La Grange's location, at approximately 13 miles (21 km) from the Chicago Loop.The village was officially incorporated on June 11, 1879. It was founded by Franklin Dwight Cossitt.