| Place Name | Mark Township |
| Place Type | Township |
| ZIP Code(s) | 43526 43536 43556 |
| County | Defiance County |
| Area Code(s) | 419,567 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 632 |
| Majority Ethnicity | White 97.19% |
| Metro/Micro Stats Area | Defiance, OH |
| US Congressional District(s) | Ohio 5th |
| State House Districts | 82 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.19% |
| African American | 0% |
| Hispanic | 1.4% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.4% |