| Place Name | Union Township (Poweshiek County) |
| Place Type | Township |
| ZIP Code(s) | 50171 50207 50242 |
| County | Poweshiek County |
| Area Code(s) | 641 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 637 |
| Majority Ethnicity | White 93.8% |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 76 |
| State Senate Districts | 38 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.8% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.2% |