| Walnut Township | |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Cowley |
| Area Total Km2: | 88.99 |
| Area Land Km2: | 88.83 |
| Area Water Km2: | 0.16 |
| Area Total Sq Mi: | 34.36 |
| Area Land Sq Mi: | 34.3 |
| Area Water Sq Mi: | 0.06 |
| Area Water Percent: | 0.18 |
| Population As Of: | 2000 |
| Population Total: | 626 |
| Population Density Sq Mi: | auto |
| Population Density Km2: | auto |
| Elevation M: | 364 |
| Elevation Ft: | 1194 |
| Coordinates: | 37.2417°N -96.9586°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0469557 |
Walnut Township is a township in Cowley County, Kansas, USA. As of the 2000 census, its population was 626.
Walnut Township covers an area of 34.36sqmi and surrounds the northern and eastern sides of the city of Winfield. According to the USGS, it contains one cemetery, Cowley.
The streams of Black Crook Creek, Cedar Creek, East Badger Creek, Lone Elm Creek, Timber Creek and West Badger Creek run through this township.