| Place Name | South New Castle |
| Place Type | Borough |
| ZIP Code(s) | 16101 16102 |
| County | Lawrence County |
| Area Code(s) | 724,878 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 678 |
| Population Growth Rate (2010-19) | -8.74% |
| Majority Ethnicity | White 97.43% |
| Metro/Micro Stats Area | New Castle, PA |
| US Congressional District(s) | Pennsylvania 3rd |
| State House Districts | 9 |
| State Senate Districts | 47 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.43% |
| African American | 0.35% |
| Hispanic | 0% |
| Asian | 0.35% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.87% |