| Place Name | Mount Gretna |
| Place Type | Borough |
| ZIP Code(s) | 17064 |
| County | Lebanon County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 197 |
| Population Growth Rate (2010-19) | -1.53% |
| Majority Ethnicity | White 100% |
| 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 | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |