| Place Name | Washington Township (Greene County) |
| Place Type | Township |
| ZIP Code(s) | 50107 50128 50129 50220 50235 |
| County | Greene County |
| Area Code(s) | 515,641 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 311 |
| Majority Ethnicity | White 87.95% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 47 |
| State Senate Districts | 24 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.95% |
| African American | 1.3% |
| Hispanic | 0% |
| Asian | 3.91% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.84% |