| Place Name | Union Township (Cerro Gordo County) |
| Place Type | Township |
| ZIP Code(s) | 50428 50479 50482 |
| County | Cerro Gordo County |
| Area Code(s) | 641 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 150 |
| Majority Ethnicity | White 99.33% |
| Metro/Micro Stats Area | Mason City, IA |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 54 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.33% |
| African American | 0% |
| Hispanic | 0.67% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |