| Official Name: | Walnut Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Montgomery |
| Government Type: | Indiana township |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.41 |
| Area Land Sq Mi: | 36.41 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Total: | 1303 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 265 |
| Elevation Ft: | 869 |
| Coordinates: | 39.9939°N -86.7519°W |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 47933, 47954, 47968 |
| Area Code: | 765 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453971 |
Walnut Township is one of eleven townships in Montgomery County, Indiana, United States. As of the 2020 census, its population was 1,303 (down from 1,394 at 2010[2]) and it contained 568 housing units.[3]
According to the 2010 census, the township has a total area of, all land.[2]
(This list is based on USGS data and may include former settlements.)
The township contains these two cemeteries: New Ross and Pisgah.