| Index | Greenbriar | Virginia | National |
| Average Test Scores | n/a | 79% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,596 | 79,221 |
| Total private schools | n/a | 553 | 24,874 |
| Total post-secondary schools | n/a | 199 | 7,963 |
| Index | Greenbriar | Virginia | National |
| Completed 8th grade | 95.3% | 85.9% | 84.3% |
| Completed high school | 94.5% | 84.7% | 83.0% |
| Completed some college | 82.2% | 64.1% | 59.4% |
| Completed associate degree | 62.8% | 44.2% | 38.5% |
| Completed bachelors | 57.7% | 36.9% | 30.3% |
| Completed masters | 23.8% | 15.7% | 11.5% |
| Completed professional degree | 4.2% | 4.2% | 3.3% |
| Completed doctorate | 2.3% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Greenbriar. Using the proficiency score averages, the average test scores for Greenbriar, VA schools is n/a. The average student to teacher ratio is n/a. In Greenbriar, VA, an average of 95.3% of students have completed 8th grade and an average of 94.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| McLean, VA | 48,566 | 95% | 97.1% |
| Great Falls, VA | 14,793 | 94% | 94.8% |
| Oakton, VA | 36,468 | 92% | 90.6% |
| Haymarket, VA | 1,485 | 90% | 88.2% |
| Burke, VA | 44,077 | 90% | 86.7% |
| Greenbriar, VA | 7,976 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Wyoming, MN | 7,976 | 60% | 24.5% |
| Duvall, WA | 7,979 | 77% | 60.4% |
| Caldwell, NJ | 7,970 | 64% | 32.3% |
| Hartsville (Trousdale County) , TN | 7,970 | 47% | 1.7% |
| Hastings-on-Hudson, NY | 7,969 | 69% | 43.8% |
| Greenbriar, VA | 7,976 | n/a |
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