| Index | O'Brien | Texas | National |
| Average Test Scores | 42% | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | O'Brien | Texas | National |
| Completed 8th grade | 58.0% | 79.3% | 84.3% |
| Completed high school | 55.6% | 77.8% | 83.0% |
| Completed some college | 43.2% | 57.3% | 59.4% |
| Completed associate degree | 22.2% | 34.9% | 38.5% |
| Completed bachelors | 19.8% | 28.1% | 30.3% |
| Completed masters | 2.5% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 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, TX schools is 42%. The average student to teacher ratio is n/a. In O'Brien, TX, an average of 58.0% of students have completed 8th grade and an average of 55.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Benjamin, TX | 238 | 55% | 13.5% |
| Munday, TX | 1,253 | 45% | 5.7% |
| Knox City, TX | 1,100 | 43% | 11.5% |
| Rule, TX | 694 | 40% | 17.7% |
| O'Brien, TX | 121 | 42% | 12.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Grass Range, MT | 121 | 55% | 14.6% |
| Elizabeth, IN | 121 | 51% | 6.3% |
| Nunam Iqua, AK | 122 | 20% | 58.3% |
| Anton Chico, NM | 120 | 28% | 42.7% |
| Perrin, TX | 122 | 37% | 22.9% |
| O'Brien, TX | 121 | 42% | 12.5% |
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