| Index | Marietta | Georgia | National |
| Average Test Scores | 58% | 42% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 55 | 2,164 | 79,221 |
| Total private schools | 19 | 515 | 24,874 |
| Total post-secondary schools | 8 | 192 | 7,963 |
| Index | Marietta | Georgia | National |
| Completed 8th grade | 83.8% | 82.3% | 84.3% |
| Completed high school | 82.4% | 81.0% | 83.0% |
| Completed some college | 65.4% | 57.8% | 59.4% |
| Completed associate degree | 44.7% | 36.8% | 38.5% |
| Completed bachelors | 36.9% | 29.4% | 30.3% |
| Completed masters | 11.8% | 11.1% | 11.5% |
| Completed professional degree | 4.0% | 3.2% | 3.3% |
| Completed doctorate | 1.5% | 1.3% | 1.3% |
There are a total of 55 public schools, 19 private schools and 8 post-secondary schools in Marietta. Using the proficiency score averages, the average test scores for Marietta, GA schools is 58%. The average student to teacher ratio is 15:1. In Marietta, GA, an average of 83.8% of students have completed 8th grade and an average of 82.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Milton, GA | 39,252 | 82% | 71.4% |
| Dunwoody, GA | 49,466 | 68% | 42.4% |
| Woodstock, GA | 32,310 | 59% | 23.1% |
| Acworth, GA | 22,683 | 58% | 20.8% |
| Roswell, GA | 94,884 | 58% | 19.8% |
| Marietta, GA | 60,687 | 58% | 19.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Terre Haute, IN | 60,690 | 43% | 10.9% |
| Malden, MA | 60,710 | 49% | 2.8% |
| Leander, TX | 60,613 | 57% | 19.1% |
| Monterey Park, CA | 60,597 | 60% | 25.6% |
| Lakewood, WA | 60,564 | 44% | 8.7% |
| Marietta, GA | 60,687 | 58% | 19.8% |
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