| Place Name | Walnut Township (Brown County) |
| Place Type | Township |
| ZIP Code(s) | 66425 66434 66515 66527 66534 |
| County | Brown County |
| Area Code(s) | 785 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 641 |
| Majority Ethnicity | White 87.94% |
| US Congressional District(s) | Kansas 2nd |
| State House Districts | 62 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.94% |
| African American | 2.29% |
| Hispanic | 0% |
| Asian | 2.75% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.02% |