| Place Name | Mont Alto |
| Place Type | Borough |
| ZIP Code(s) | 17237 |
| County | Franklin County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 1,649 |
| Population Growth Rate (2010-19) | -7.33% |
| Majority Ethnicity | White 93.25% |
| 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 | 93.25% |
| African American | 2.02% |
| Hispanic | 0% |
| Asian | 1.58% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.15% |