| Place Name | Union Township (Marshall County) |
| Place Type | Township |
| ZIP Code(s) | 46511 46563 |
| County | Marshall County |
| Area Code(s) | 574 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 2,821 |
| Majority Ethnicity | White 97.99% |
| Metro/Micro Stats Area | Plymouth, IN |
| US Congressional District(s) | Indiana 2nd |
| State House Districts | 17 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.99% |
| African American | 0.7% |
| Hispanic | 0% |
| Asian | 0.25% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.06% |