High 96F. NE winds shifting to W at 10 to 15 mph. Evening: Partly cloudy. Low 63F. Winds SW at 5 to 10 mph.
Lemont is a village located in Cook, DuPage, and Will counties in the U.S. state of Illinois, and is a suburb of Chicago. The population was 16,000 as of the 2010 census. Lemont has a substantial immigrant population. Lemont is home to the CITGO Refinery, Argonne National Laboratory and other heavy industrial sites.
Lemont, IL Profile: Facts, Map & Data. Lemont, Illinois - Basic Facts. The Village of Lemont had a population of 16,405 as of July 1, 2016. Lemont ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.