| Place Name | Armagh Township |
| Place Type | Township |
| County | Mifflin County |
| Area Code(s) | 717 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 3,997 |
| Majority Ethnicity | White 94.98% |
| Metro/Micro Stats Area | Lewistown, PA |
| US Congressional District(s) | Pennsylvania 10th |
| State House Districts | 171 |
| State Senate Districts | 34 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.98% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.02% |