| Place Name | Jefferson Township (Mercer County) |
| Place Type | Township |
| ZIP Code(s) | 16124 16137 16148 16150 16154 |
| County | Mercer County |
| Area Code(s) | 724,878 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,582 |
| Majority Ethnicity | White 99.3% |
| Metro/Micro Stats Area | Youngstown-Warren-Boardman, OH-PA |
| US Congressional District(s) | Pennsylvania 3rd |
| State House Districts | 17 |
| State Senate Districts | 50 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.3% |
| African American | 0% |
| Hispanic | 0.38% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.32% |