| Index | Rainier | Oregon | National |
| Average Test Scores | 37% | 46% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 3 | 1,097 | 79,221 |
| Total private schools | n/a | 361 | 24,874 |
| Total post-secondary schools | n/a | 89 | 7,963 |
| Index | Rainier | Oregon | National |
| Completed 8th grade | 89.7% | 86.3% | 84.3% |
| Completed high school | 89.4% | 85.4% | 83.0% |
| Completed some college | 58.0% | 66.1% | 59.4% |
| Completed associate degree | 24.8% | 39.9% | 38.5% |
| Completed bachelors | 15.5% | 31.4% | 30.3% |
| Completed masters | 4.6% | 11.9% | 11.5% |
| Completed professional degree | 0.0% | 3.6% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Rainier. Using the proficiency score averages, the average test scores for Rainier, OR schools is 37%. The average student to teacher ratio is 21:1. In Rainier, OR, an average of 89.7% of students have completed 8th grade and an average of 89.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| La Center, WA | 3,338 | 57% | 18.2% |
| Kalama, WA | 2,708 | 53% | 10.4% |
| Woodland, WA | 6,223 | 51% | 6.6% |
| Kelso, WA | 12,237 | 46% | 5.0% |
| Castle Rock, WA | 2,917 | 46% | 5.2% |
| Rainier, OR | 2,080 | 37% | 23.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Townsend, MT | 2,080 | 49% | 1.7% |
| Ringgold, LA | 2,080 | 52% | 8.3% |
| Delcambre, LA | 2,079 | 89% | 85.4% |
| Morrisville, NY | 2,081 | 51% | 5.7% |
| Watervliet, MI | 2,082 | 37% | 22.7% |
| Rainier, OR | 2,080 | 37% | 23.3% |
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