| Place Name | Fairfield Township (Westmoreland County) |
| Place Type | Township |
| County | Westmoreland County |
| Area Code(s) | 724,878 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 2,171 |
| Majority Ethnicity | White 97.59% |
| Metro/Micro Stats Area | Pittsburgh, PA |
| US Congressional District(s) | Pennsylvania 12th |
| State House Districts | 59 |
| State Senate Districts | 39 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.59% |
| African American | 0.59% |
| Hispanic | 0.09% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.73% |