| Place Name | Union Township (Van Buren County) |
| Place Type | Township |
| ZIP Code(s) | 52535 52565 52651 |
| County | Van Buren County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 874 |
| Majority Ethnicity | White 96.87% |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 82 |
| State Senate Districts | 41 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.87% |
| African American | 0.81% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.32% |