East Grove Township is one of twenty-two townships in Lee County, Illinois, United States. As of the 2010 census, its population was 256 and it contained 115 housing units.
East Grove was created from Hamilton Township on November 9, 1864.
According to the 2010 census, the township has a total area of , of which (or 99.83%) is land and (or 0.17%) is water.
The township contains these three cemeteries: Saint Mary's, Stevens and Williams.