| Place Name | Plank Township |
| Place Type | Township |
| ZIP Code(s) | 52231 52335 52355 52576 52591 |
| County | Keokuk County |
| Area Code(s) | 641,319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 444 |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 78 |
| State Senate Districts | 39 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |