| Rainier Junior/Senior High School | |
| Streetaddress: | 28170 Old Rainier Road |
| City: | Rainier |
| County: | Columbia County |
| State: | Oregon |
| Zipcode: | 97048 |
| Country: | United States |
| Coordinates: | 46.0917°N -122.989°W |
| Type: | Public |
| District: | Rainier School District |
| Principal: | Graden Blue, Kim Oblack [1] [2] |
| Grades: | 7-12 |
| Students: | 385 (2022-2023)[3] |
| Ratio: | 19.09 |
| Staff: | 20.17 (FTE) |
| Mascot: | Columbian |
| Colors: | Green, black, and white |
| Conference: | OSAA Lewis & Clark League 3A-1 |
| Homepage: | Rainier HS website |
Rainier Junior/Senior High School is a public school in Rainier, Oregon, United States that serves middle- and high school-aged students.