Blue River Township is one of twelve townships in Harrison County, Indiana, United States. As of the 2020 census, its population was 2,016 and it contained 866 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.46%) is land and (or 0.57%) is water. The stream of Baldy Creek runs through this township.
(This list is based on USGS data and may include former settlements.)
The township contains four major cemeteries: Boston, Breedlove, Mount Zion and Reno.