| Official Name: | Grand River Township, South Dakota |
| Settlement Type: | Township |
| Pushpin Map: | South Dakota |
| Pushpin Label: | Grand River Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | South Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Perkins |
| Area Total Sq Mi: | 51.7 |
| Population As Of: | 2020 |
| Population Total: | 51 |
| Population Density Sq Mi: | 1 |
| Coordinates: | 45.8861°N -102.6314°W |
Grand River Township is a township in Perkins County, in the U.S. state of South Dakota. As of the 2020 census, it contains 51 people and 32 households.[1]