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.
According to the 2010 census, the township has a total area of , of which (or 99.89%) is land and (or 0.14%) is water.
Homer Township and Homer Glen is part of the Homer Community Consolidated School District 33C, with some areas part of Will County School District 92.