| Name | Washington County |
| State | Ohio |
| FIPS Code | 39167 |
| County Seat | Marietta |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 58,513 |
| Population Growth Rate(2020-2024) | -2.16% |
| Majority Ethnicity | White 96.66% |
| Public School Majority Ethnicity | White 93% |
| Partisan Voting Index | Strongly Republican:+22 |
| Unemployment Rate (May 2026) | 5.2% |
| Sales Tax Rate (2025) | 7.25% |
| Area Code(s) | 220 / 740 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 96.66% |
| African American | 1.2% |
| Hispanic | 1.24% |
| Asian | 0.67% |
| Native American | 0.23% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 92.93% |
| African American | 0.68% |
| Hispanic | 1.8% |
| Asian | 0.5% |
| Native American | 0.08% |
| Hawaiin/Pacific Islander | 0.09% |