| Place Name | Mifflin |
| Place Type | Borough |
| ZIP Code(s) | 17058 |
| County | Juniata County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 537 |
| Population Growth Rate (2010-19) | -17.45% |
| Majority Ethnicity | White 84.4% |
| US Congressional District(s) | Pennsylvania 10th |
| State House Districts | 82 |
| State Senate Districts | 34 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 84.4% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 15.6% |