| Place Name | Marion Township (Mercer County) |
| Place Type | Township |
| County | Mercer County |
| Area Code(s) | 419,567 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 3,266 |
| Majority Ethnicity | White 95.41% |
| Metro/Micro Stats Area | Celina, OH |
| US Congressional District(s) | Ohio 8th |
| State House Districts | 84 |
| State Senate Districts | 12 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.41% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 1.85% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.74% |