| Place Name | Walnut Township (Polk County) |
| Place Type | Township |
| County | Polk County |
| Area Code(s) | 515 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 68,743 |
| Majority Ethnicity | White 83.15% |
| Metro/Micro Stats Area | Des Moines-West Des Moines, IA |
| US Congressional District(s) | Iowa 3rd |
| State House Districts | 40,42,43 |
| State Senate Districts | 20,21,22 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 83.15% |
| African American | 5.79% |
| Hispanic | 0.19% |
| Asian | 4.37% |
| Native American | 0.07% |
| Hawaiin/Pacific Islander | 6.43% |