| Place Name | Washington Township (Darke County) |
| Place Type | Township |
| ZIP Code(s) | 45331 45390 |
| County | Darke County |
| Area Code(s) | 326,937 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 1,245 |
| Majority Ethnicity | White 85.67% |
| Metro/Micro Stats Area | Greenville, OH |
| US Congressional District(s) | Ohio 8th |
| State House Districts | 84 |
| State Senate Districts | 12 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 85.67% |
| African American | 3.36% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 10.97% |