| Place Name | Pen Mar |
| Place Type | Census Designated Place |
| ZIP Code(s) | 17268 |
| County | Franklin County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 890 |
| Population Growth Rate (2010-19) | 1.94% |
| Majority Ethnicity | White 97.27% |
| Metro/Micro Stats Area | Chambersburg-Waynesboro, PA |
| US Congressional District(s) | Pennsylvania 9th |
| State House Districts | 90 |
| State Senate Districts | 33 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.27% |
| African American | 2.73% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |