| 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 | 49,909 | 95% | 97.1% |
| Great Falls, VA | 15,140 | 94% | 94.8% |
| Oakton, VA | 37,413 | 92% | 90.6% |
| Haymarket, VA | 1,540 | 90% | 88.2% |
| Burke, VA | 45,553 | 90% | 86.7% |
| Greenbriar, VA | 8,145 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Lexington, TN | 8,145 | 40% | 16.5% |
| Long Grove, IL | 8,145 | 70% | 46.5% |
| Lake Geneva, WI | 8,147 | 51% | 6.5% |
| Bainbridge, OH | 8,143 | 51% | 6.5% |
| West Long Branch, NJ | 8,149 | 60% | 25.7% |
| Greenbriar, VA | 8,145 | n/a |