| Place Name | Marietta |
| Place Type | Borough |
| ZIP Code(s) | 17547 |
| County | Lancaster County |
| Area Code(s) | 717 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 2,607 |
| Population Growth Rate (2010-19) | 1.35% |
| Majority Ethnicity | White 86.97% |
| Metro/Micro Stats Area | Lancaster, PA |
| US Congressional District(s) | Pennsylvania 16th |
| State House Districts | 98 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 86.97% |
| African American | 4.29% |
| Hispanic | 0% |
| Asian | 0.28% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 8.46% |