| Index | O'Brien | Oregon | National |
| Average Test Scores | n/a | 46% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 1,097 | 79,221 |
| Total private schools | n/a | 361 | 24,874 |
| Total post-secondary schools | n/a | 89 | 7,963 |
| Index | O'Brien | Oregon | National |
| Completed 8th grade | 92.6% | 86.3% | 84.3% |
| Completed high school | 92.6% | 85.4% | 83.0% |
| Completed some college | 80.3% | 66.1% | 59.4% |
| Completed associate degree | 34.0% | 39.9% | 38.5% |
| Completed bachelors | 34.0% | 31.4% | 30.3% |
| Completed masters | 0.0% | 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 n/a public schools, n/a private schools and n/a post-secondary schools in O'Brien. Using the proficiency score averages, the average test scores for O'Brien, OR schools is n/a. The average student to teacher ratio is n/a. In O'Brien, OR, an average of 92.6% of students have completed 8th grade and an average of 92.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cave Junction, OR | 2,153 | 32% | 33.7% |
| O'Brien, OR | 639 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Heath Springs, SC | 639 | 45% | 7.3% |
| New Market, IN | 639 | 60% | 24.0% |
| Pe Ell, WA | 639 | 55% | 13.5% |
| Swea City, IA | 639 | 63% | 31.8% |
| Battle Lake, MN | 639 | 71% | 47.4% |
| O'Brien, OR | 639 | n/a |
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