Homer Township is located in Will County, Illinois. As of the 2010 census, its population was 39,059 and it contained 13,418 housing units. In 2001, the village of Homer Glen was incorporated within area that is Homer Township. This region was formerly an unincorporated census-designated place known as Goodings Grove, Illinois. It also had an unincorporated town of Hadley within its borders and a proposed railway, the Chicago, Joliet and Peoria Rwy.
According to the 2010 census, the township has a total area of 36.1 square miles (93 km2), of which 36.06 square miles (93.4 km2) (or 99.89%) is land and 0.05 square miles (0.13 km2) (or 0.14%) is water.