| Place Name | Seltzer |
| Place Type | Census Designated Place |
| ZIP Code(s) | 17974 |
| County | Schuylkill County |
| Area Code(s) | 272,570 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 304 |
| Population Growth Rate (2010-19) | -9.14% |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Pottsville, PA |
| US Congressional District(s) | Pennsylvania 17th |
| State House Districts | 125 |
| State Senate Districts | 29 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |