| Place Name | Rainier |
| Place Type | City |
| ZIP Code(s) | 97048 |
| County | Columbia County |
| Area Code(s) | 503,971 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 1,807 |
| Population Growth Rate (2010-19) | 0.84% |
| Majority Ethnicity | White 88.26% |
| Metro/Micro Stats Area | Portland-Vancouver-Hillsboro, OR-WA |
| US Congressional District(s) | Oregon 1st |
| State House Districts | 31 |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 88.26% |
| African American | 1.45% |
| Hispanic | 2.39% |
| Asian | 1.97% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.92% |