| Place Name | Union Township (Harrison County) |
| Place Type | Township |
| ZIP Code(s) | 64442 64481 |
| County | Harrison County |
| Area Code(s) | 660 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 414 |
| Majority Ethnicity | White 98.77% |
| US Congressional District(s) | Missouri 6th |
| State House Districts | 2 |
| State Senate Districts | 12 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.77% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.23% |