Indian Grove Township is located in Livingston County, Illinois. As of the 2010 census, its population was 4,297 and it contained 1,814 housing units. Indian Grove Township changed its name from Worth Township on May 11, 1858.
According to the 2010 census, the township has a total area of , of which (or 99.37%) is land and (or 0.63%) is water.