| Place Name | Union Township (Black Hawk County) |
| Place Type | Township |
| ZIP Code(s) | 50613 50647 50660 |
| County | Black Hawk County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 705 |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Waterloo-Cedar Falls, IA |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 63 |
| State Senate Districts | 32 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |