| Official Name: | Blue River Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Johnson |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 24.44 |
| Area Land Sq Mi: | 24.28 |
| Area Water Sq Mi: | 0.16 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 4837 |
| Population Density Sq Mi: | 203.3 |
| Elevation Footnotes: | [2] |
| Elevation M: | 216 |
| Elevation Ft: | 709 |
| Coordinates: | 39.3906°N -85.9917°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-06094[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453120 |
Blue River Township is one of nine townships in Johnson County, Indiana, United States. As of the 2010 census, its population was 4,936 and it contained 2,096 housing units.[4]
The Furnas Mill Bridge was listed on the National Register of Historic Places in 2001.
According to the 2010 census, the township has a total area of, of which (or 99.35%) is land and (or 0.65%) is water.[4]