| Place Name | Armagh |
| Place Type | Borough |
| ZIP Code(s) | 15920 |
| County | Indiana County |
| Area Code(s) | 814 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 90 |
| Population Growth Rate (2010-19) | -16.39% |
| Majority Ethnicity | White 99.12% |
| Metro/Micro Stats Area | Indiana, PA |
| US Congressional District(s) | Pennsylvania 9th |
| State House Districts | 62 |
| State Senate Districts | 41 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.12% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.88% |