| Index | Marietta | Pennsylvania | National |
| Average Test Scores | 56% | 55% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 2 | 2,563 | 79,221 |
| Total private schools | 1 | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Marietta | Pennsylvania | National |
| Completed 8th grade | 81.0% | 86.9% | 84.3% |
| Completed high school | 80.7% | 85.6% | 83.0% |
| Completed some college | 41.6% | 53.6% | 59.4% |
| Completed associate degree | 25.5% | 37.4% | 38.5% |
| Completed bachelors | 19.0% | 29.3% | 30.3% |
| Completed masters | 4.0% | 11.5% | 11.5% |
| Completed professional degree | 1.0% | 3.3% | 3.3% |
| Completed doctorate | 0.6% | 1.4% | 1.3% |
There are a total of 2 public schools, 1 private schools and n/a post-secondary schools in Marietta. Using the proficiency score averages, the average test scores for Marietta, PA schools is 56%. The average student to teacher ratio is 15:1. In Marietta, PA, an average of 81.0% of students have completed 8th grade and an average of 80.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bainbridge, PA | 1,399 | 84% | 75.0% |
| York Haven, PA | 819 | 77% | 60.4% |
| Conestoga, PA | 1,128 | 75% | 55.2% |
| Millersville, PA | 8,309 | 74% | 54.7% |
| Wrightsville, PA | 2,045 | 72% | 50.3% |
| Marietta, PA | 2,616 | 56% | 16.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Ruleville, MS | 2,617 | 23% | 52.4% |
| Unionville, TN | 2,615 | 27% | 43.8% |
| Freemansburg, PA | 2,617 | 27% | 43.8% |
| Landrum, SC | 2,614 | 48% | 1.0% |
| Pearl River, LA | 2,618 | 72% | 50.3% |
| Marietta, PA | 2,616 | 56% | 16.7% |
Here are the best places to live in Pennsylvania
See the best places to live in Marietta
Safest States In The US
Check out the 10 most dangerous cities in Pennsylvania