| Place Name | Walnut Township (Marshall County) |
| Place Type | Township |
| ZIP Code(s) | 46501 46570 |
| County | Marshall County |
| Area Code(s) | 574 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 2,873 |
| Majority Ethnicity | White 98.48% |
| Metro/Micro Stats Area | Plymouth, IN |
| US Congressional District(s) | Indiana 2nd |
| State House Districts | 17 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.48% |
| African American | 0.25% |
| Hispanic | 0.21% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.06% |