| Official Name: | Grant Township, Boone County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Boone |
| Area Total Km2: | 93.86 |
| Area Land Km2: | 93.86 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.24 |
| Area Land Sq Mi: | 36.24 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2000 |
| Population Total: | 408 |
| Population Density Km2: | 4.3 |
| Population Density Sq Mi: | 11.3 |
| Elevation Footnotes: | [1] |
| Elevation M: | 347 |
| Elevation Ft: | 1138 |
| Coordinates: | 42.1697°N -94.1011°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-91629[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0467930 |
Grant Township is one of seventeen townships in Boone County, Iowa, United States. As of the 2000 census, its population was 408.
Grant Township was organized in 1871.[3]
Grant Township covers an area of 36.24sqmi and contains one incorporated settlement, Boxholm. According to the USGS, it contains three cemeteries: Lawn, Renner and Union.