| Place Name | St. Joseph Township |
| Place Type | Township |
| ZIP Code(s) | 43517 43518 |
| County | Williams County |
| Area Code(s) | 419,567 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 2,666 |
| Majority Ethnicity | White 92.87% |
| US Congressional District(s) | Ohio 5th |
| State House Districts | 81 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.87% |
| African American | 1.23% |
| Hispanic | 0.54% |
| Asian | 1.46% |
| Native American | 0.23% |
| Hawaiin/Pacific Islander | 3.66% |