DuBois Township is located in Washington County, Illinois. As of the 2010 census, its population was 748 and it contained 366 housing units.
DuBois Township is named for Jesse K. Du Bois, state auditor of public accounts, 1856âÂÂ1864.
According to the 2010 census, the township has a total area of , of which (or 99.89%) is land and (or 0.11%) is water.