| Place Name | South Union Township |
| Place Type | Township |
| ZIP Code(s) | 15401 15436 15445 15484 |
| County | Fayette County |
| Area Code(s) | 724,878 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 10,842 |
| Majority Ethnicity | White 95.25% |
| Metro/Micro Stats Area | Pittsburgh, PA |
| US Congressional District(s) | Pennsylvania 9th |
| State House Districts | 51 |
| State Senate Districts | 32 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.25% |
| African American | 2.65% |
| Hispanic | 0% |
| Asian | 1.84% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.27% |