| Index | Dahlgren | Virginia | National |
| Average Test Scores | 85% | 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 | Dahlgren | Virginia | National |
| Completed 8th grade | 87.7% | 85.9% | 84.3% |
| Completed high school | 87.7% | 84.7% | 83.0% |
| Completed some college | 66.6% | 64.1% | 59.4% |
| Completed associate degree | 45.5% | 44.2% | 38.5% |
| Completed bachelors | 31.5% | 36.9% | 30.3% |
| Completed masters | 13.5% | 15.7% | 11.5% |
| Completed professional degree | 1.9% | 4.2% | 3.3% |
| Completed doctorate | 1.2% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Dahlgren. Using the proficiency score averages, the average test scores for Dahlgren, VA schools is 85%. The average student to teacher ratio is n/a. In Dahlgren, VA, an average of 87.7% of students have completed 8th grade and an average of 87.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| King George, VA | 4,752 | 82% | 70.8% |
| Colonial Beach, VA | 3,675 | 75% | 56.6% |
| Triangle, VA | 10,821 | 71% | 48.4% |
| Bryantown, MD | 481 | 48% | = 100 |
| La Plata, MD | 9,875 | 47% | 2.6% |
| Dahlgren, VA | 3,645 | 85% | 76.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Roselawn, IN | 3,644 | 35% | 28.1% |
| Montauk, NY | 3,644 | 55% | 13.5% |
| Gallipolis, OH | 3,646 | 64% | 32.7% |
| Kimberly, AL | 3,646 | 52% | 8.9% |
| Willcox, AZ | 3,643 | 47% | 3.1% |
| Dahlgren, VA | 3,645 | 85% | 76.0% |
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