| Place Name | St. Clair (Blair County) |
| Place Type | Census Designated Place |
| ZIP Code(s) | 16693 |
| County | Blair County |
| Area Code(s) | 814 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 68 |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Altoona, PA |
| US Congressional District(s) | Pennsylvania 9th |
| State House Districts | 80 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |