| Place Name | Seneca |
| Place Type | City |
| ZIP Code(s) | 97873 |
| County | Grant County |
| Area Code(s) | 458,541 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 125 |
| Population Growth Rate (2010-19) | -17.09% |
| Majority Ethnicity | White 91.67% |
| US Congressional District(s) | Oregon 2nd |
| State House Districts | 60 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.67% |
| African American | 0% |
| Hispanic | 2.45% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.88% |