| Place Name | Union Township (Mccook County) |
| Place Type | Township |
| ZIP Code(s) | 57012 57319 |
| County | Mccook County |
| Area Code(s) | 605 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 189 |
| Majority Ethnicity | White 96.83% |
| Metro/Micro Stats Area | Sioux Falls, SD |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 19 |
| State Senate Districts | 19 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.83% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.17% |