Eagle Township is one of twelve townships in Boone County, Indiana. As of the 2010 census, its population was 21,977 and it contained 8,231 housing units.
Pryor Brock Farmstead, Maplelawn Farmstead, Traders Point Eagle Creek Rural Historic District, and Traders Point Hunt Rural Historic District are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of , of which (or 99.70%) is land and (or 0.34%) is water.
The township contains six cemeteries: Clarkstown, Cox, Jones, Lincoln Memory Gardens, Pitzer, Salem and Sheets.