| Official Name: | Walnut Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Brown |
| Area Total Km2: | 161.86 |
| Area Land Km2: | 161.12 |
| Area Water Km2: | 0.74 |
| Area Total Sq Mi: | 62.49 |
| Area Land Sq Mi: | 62.21 |
| Area Water Sq Mi: | 0.28 |
| Area Water Percent: | 0.46 |
| Population As Of: | 2000 |
| Population Total: | 665 |
| Population Density Km2: | 4.1 |
| Population Density Sq Mi: | 10.7 |
| Elevation M: | 338 |
| Elevation Ft: | 1109 |
| Coordinates: | 39.8439°N -95.6878°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0472753 |
Walnut Township is a township in Brown County, Kansas, USA. As of the 2000 census, its population was 665.
Walnut Township was formed in 1872.[1]
Walnut Township covers an area of 62.49sqmi and contains one incorporated settlement, Fairview. According to the USGS, it contains six cemeteries: Congregational, Fairview, Isley, Lambertson, Saint Paul and Shelton.
The streams of Mulberry Creek, Noharts Creek and Spring Creek run through this township.