| Official Name: | Grant Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | DeKalb |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 17.49 |
| Area Land Sq Mi: | 17.47 |
| Area Water Sq Mi: | 0.02 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 3086 |
| Population Density Sq Mi: | 185.8 |
| Elevation Footnotes: | [2] |
| Elevation M: | 272 |
| Elevation Ft: | 892 |
| Coordinates: | 41.4211°N -85.02°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-28836[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453335 |
Grant Township is one of fifteen townships in DeKalb County, Indiana. As of the 2020 census, its population was 3,086, down from 3,245 at the 2010 census,[4] and it contained 1,293 housing units.
According to the 2010 census, the township has a total area of, of which (or 99.89%) is land and (or 0.11%) is water.[4]
The township contains three cemeteries: Lutz, Ridge, and Tamarack.
Grant Township residents are eligible to obtain a library card at the Waterloo-Grant Township Public Library in Waterloo.[5]