| Place Name | Seneca Township |
| Place Type | Township |
| ZIP Code(s) | 43521 43533 49235 49256 49279 |
| County | Lenawee County |
| Area Code(s) | 517 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,134 |
| Majority Ethnicity | White 97.35% |
| Metro/Micro Stats Area | Adrian, MI |
| US Congressional District(s) | Michigan 7th |
| State House Districts | 57 |
| State Senate Districts | 17 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.35% |
| African American | 0.09% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.56% |