New Lenox Township is located in the heart of Will County, Illinois on US Route 30 and Interstate 80. As of the 2010 census, its population was 40,270 and it contained 13,721 housing units. New Lenox Township has thirty-six square miles within its jurisdiction. It serves almost all of the Village of New Lenox and parts of the individual municipalities of Mokena, Homer Glen, Joliet and, of course, the entire unincorporated areas of the New Lenox community.