| 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 | 36,755 | 82% | 70.9% |
| Dunwoody, GA | 48,128 | 68% | 42.0% |
| Woodstock, GA | 27,964 | 59% | 22.8% |
| Acworth, GA | 21,824 | 58% | 20.5% |
| Roswell, GA | 93,968 | 58% | 19.5% |
| Marietta, GA | 59,714 | 58% | 21.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Springfield, OH | 59,761 | 49% | 1.0% |
| Lakeville, MN | 59,786 | 68% | 40.9% |
| St. Clair Shores, MI | 59,916 | 42% | 13.6% |
| Pontiac, MI | 59,920 | 16% | 66.8% |
| Moore, OK | 59,501 | 39% | 19.1% |
| Marietta, GA | 59,714 | 58% | 21.1% |
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