| Official Name: | Grainfield Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Gove |
| Area Total Km2: | 184.31 |
| Area Land Km2: | 184.3 |
| Area Water Km2: | 0.01 |
| Area Total Sq Mi: | 71.16 |
| Area Land Sq Mi: | 71.16 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0.01 |
| Population As Of: | 2020 |
| Population Total: | 406 |
| Population Density Km2: | 2.3 |
| Population Density Sq Mi: | 6 |
| Elevation M: | 853 |
| Elevation Ft: | 2799 |
| Coordinates: | 39.0694°N -100.4836°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0471315 |
Grainfield Township is a township in Gove County, Kansas, USA. As of the 2020 census, its population was 406.
Grainfield Township covers an area of 71.16sqmi and contains one incorporated settlement, Grainfield. According to the USGS, it contains one cemetery, Grainfield.