| Place Name | Walnut Township (Marshall County) |
| Place Type | Township |
| ZIP Code(s) | 66412 66508 66548 |
| County | Marshall County |
| Area Code(s) | 785 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 260 |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | Kansas 2nd |
| State House Districts | 106 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |