| Place Name | Union Township (Crawford County) |
| Place Type | Township |
| ZIP Code(s) | 51520 51528 |
| County | Crawford County |
| Area Code(s) | 712 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 663 |
| Majority Ethnicity | White 89.11% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 18 |
| State Senate Districts | 9 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 89.11% |
| African American | 0% |
| Hispanic | 1.66% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 9.23% |