Custer Township is located in Will County, Illinois. As of the 2010 census, its population was 1,430 and it contained 612 housing units.
Custer Township was organized in 1886, and named after George Armstrong Custer (1839âÂÂ1876), an American Civil War general and Indian fighter.
According to the 2010 census, the township has a total area of , of which (or 97.72%) is land and (or 2.31%) is water.