| Place Name | Dayton |
| Place Type | City |
| ZIP Code(s) | 99328 |
| County | Columbia County |
| Area Code(s) | 509 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 2,852 |
| Population Growth Rate (2010-19) | -3.09% |
| Majority Ethnicity | White 87.03% |
| US Congressional District(s) | Washington 5th |
| State House Districts | 16 |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.03% |
| African American | 0.62% |
| Hispanic | 0.37% |
| Asian | 0.08% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 11.89% |