| 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 | 49,909 | 95% | 97.1% |
| Great Falls, VA | 15,140 | 94% | 94.8% |
| Oakton, VA | 37,413 | 92% | 90.6% |
| Chantilly, VA | 24,744 | 89% | 85.7% |
| Belmont, VA | 9,583 | 89% | 85.4% |
| Countryside, VA | 9,823 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| White Horse, NJ | 9,822 | 41% | 15.6% |
| Corona de Tucson, AZ | 9,822 | 72% | 49.0% |
| Morehead City, NC | 9,827 | 58% | 20.8% |
| Evergreen, CO | 9,818 | 57% | 18.5% |
| Fort Irwin, CA | 9,812 | 48% | = 100 |
| Countryside, VA | 9,823 | n/a |