| Official Name: | Grand River Township, Adair County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Adair |
| Area Total Km2: | 93 |
| Area Land Km2: | 92.75 |
| Area Water Km2: | 0.25 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 35.91 |
| Area Land Sq Mi: | 35.81 |
| Area Water Sq Mi: | 0.1 |
| Population As Of: | 2020 |
| Population Total: | 140 |
| Population Density Sq Mi: | 4.0 |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 360 |
| Elevation Ft: | 1181 |
| Coordinates: | 41.2875°N -94.2975°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-91608[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0467923 |
Grand River Township is one of seventeen townships in Adair County, Iowa, USA. As of the 2020 census, its population was 140.[3]
Grand River Township was organized in 1855.[4] [5]
Grand River Township covers an area of 35.91sqmi and contains no incorporated settlements. According to the USGS, it contains three cemeteries: Boley Farm, Grand River Center and Hebron.