| 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 |


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| 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 | 40,389 | 82% | 71.4% |
| Dunwoody, GA | 51,076 | 68% | 42.4% |
| Woodstock, GA | 33,394 | 59% | 23.1% |
| Acworth, GA | 23,459 | 58% | 20.8% |
| Roswell, GA | 98,234 | 58% | 19.8% |
| Marietta, GA | 62,336 | 58% | 19.8% |
| City | Population | Avg. Test Scores | National Avg. |
| La Mesa, CA | 62,341 | 51% | 5.3% |
| Novi, MI | 62,295 | 67% | 38.9% |
| Petaluma, CA | 62,491 | 52% | 7.7% |
| Coconut Creek, FL | 62,174 | 56% | 15.8% |
| Leander, TX | 62,512 | 57% | 19.1% |
| Marietta, GA | 62,336 | 58% | 19.8% |