| Place Name | Mercersburg |
| Place Type | Borough |
| ZIP Code(s) | 17236 |
| County | Franklin County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 1,668 |
| Population Growth Rate (2010-19) | -3.46% |
| Majority Ethnicity | White 86.29% |
| Metro/Micro Stats Area | Chambersburg-Waynesboro, PA |
| US Congressional District(s) | Pennsylvania 9th |
| State House Districts | 78 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 86.29% |
| African American | 9.04% |
| Hispanic | 0% |
| Asian | 0.58% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.09% |