| Place Name | South Londonderry Township |
| Place Type | Township |
| County | Lebanon County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 8,578 |
| Majority Ethnicity | White 92.04% |
| Metro/Micro Stats Area | Lebanon, PA |
| US Congressional District(s) | Pennsylvania 15th |
| State House Districts | 101 |
| State Senate Districts | 48 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.04% |
| African American | 0.54% |
| Hispanic | 0% |
| Asian | 1.99% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.44% |