| Index | Garrett Park | Maryland | National |
| Average Test Scores | n/a | 40% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 1,163 | 79,221 |
| Total private schools | n/a | 674 | 24,874 |
| Total post-secondary schools | n/a | 112 | 7,963 |
| Index | Garrett Park | Maryland | National |
| Completed 8th grade | 99.2% | 87.5% | 84.3% |
| Completed high school | 99.2% | 86.5% | 83.0% |
| Completed some college | 93.9% | 64.2% | 59.4% |
| Completed associate degree | 82.7% | 44.8% | 38.5% |
| Completed bachelors | 80.2% | 38.4% | 30.3% |
| Completed masters | 49.4% | 17.7% | 11.5% |
| Completed professional degree | 22.8% | 5.5% | 3.3% |
| Completed doctorate | 10.2% | 2.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Garrett Park. Using the proficiency score averages, the average test scores for Garrett Park, MD schools is n/a. The average student to teacher ratio is n/a. In Garrett Park, MD, an average of 99.2% of students have completed 8th grade and an average of 99.2% 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% |
| Vienna, VA | 16,532 | 88% | 83.4% |
| Arlington, VA | 236,434 | 83% | 72.5% |
| Garrett Park, MD | 840 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Inverness, MS | 840 | 42% | 12.5% |
| Attica, OH | 840 | 73% | 51.0% |
| Cedar Key, FL | 840 | 52% | 8.3% |
| New Tripoli, PA | 840 | 70% | 44.8% |
| Congerville, IL | 840 | 55% | 14.6% |
| Garrett Park, MD | 840 | n/a |
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