| Place Name | Mount Pleasant |
| Place Type | Borough |
| ZIP Code(s) | 15666 |
| County | Westmoreland County |
| Area Code(s) | 724,878 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 4,469 |
| Population Growth Rate (2010-19) | -4.69% |
| Majority Ethnicity | White 96.49% |
| Metro/Micro Stats Area | Pittsburgh, PA |
| US Congressional District(s) | Pennsylvania 18th |
| State House Districts | 58 |
| State Senate Districts | 32 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.49% |
| African American | 2.42% |
| Hispanic | 0% |
| Asian | 0.85% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.24% |