| Place Name | Fairfield Township (Washington County) |
| Place Type | Township |
| ZIP Code(s) | 45724 45784 45786 |
| County | Washington County |
| Area Code(s) | 220,740 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,086 |
| Majority Ethnicity | White 86.99% |
| Metro/Micro Stats Area | Marietta, OH |
| US Congressional District(s) | Ohio 6th |
| State House Districts | 94 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 86.99% |
| African American | 11.11% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.9% |