| Place Name | Fairfield |
| Place Type | Borough |
| ZIP Code(s) | 17320 |
| County | Adams County |
| Area Code(s) | 717 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 588 |
| Population Growth Rate (2010-19) | 3.75% |
| Majority Ethnicity | White 98.67% |
| Metro/Micro Stats Area | Gettysburg, PA |
| US Congressional District(s) | Pennsylvania 4th |
| State House Districts | 91 |
| State Senate Districts | 33 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.67% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.33% |