| Index | Countryside | 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 | Countryside | Virginia | National |
| Completed 8th grade | 94.7% | 85.9% | 84.3% |
| Completed high school | 94.4% | 84.7% | 83.0% |
| Completed some college | 80.0% | 64.1% | 59.4% |
| Completed associate degree | 60.2% | 44.2% | 38.5% |
| Completed bachelors | 51.3% | 36.9% | 30.3% |
| Completed masters | 17.7% | 15.7% | 11.5% |
| Completed professional degree | 3.1% | 4.2% | 3.3% |
| Completed doctorate | 1.7% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Countryside. Using the proficiency score averages, the average test scores for Countryside, VA schools is n/a. The average student to teacher ratio is n/a. In Countryside, VA, an average of 94.7% of students have completed 8th grade and an average of 94.4% 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% |
| Chantilly, VA | 23,820 | 89% | 85.7% |
| Belmont, VA | 9,341 | 89% | 85.4% |
| Countryside, VA | 9,517 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| La Plata, MD | 9,516 | 47% | 2.6% |
| DuPont, WA | 9,514 | 61% | 26.0% |
| Orono, ME | 9,523 | 59% | 22.2% |
| Helotes, TX | 9,525 | 69% | 44.4% |
| Reedsburg, WI | 9,508 | 38% | 21.9% |
| Countryside, VA | 9,517 | n/a |
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