| Index | Marietta CDP | Oklahoma | National |
| Average Test Scores | n/a | 32% | 48% |
| Student/Teacher ratio | n/a | 22:1 | 16:1 |
| Total public schools | n/a | 1,346 | 79,221 |
| Total private schools | n/a | 159 | 24,874 |
| Total post-secondary schools | n/a | 178 | 7,963 |
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| Index | Marietta CDP | Oklahoma | National |
| Completed 8th grade | 96.1% | 83.5% | 84.3% |
| Completed high school | 88.2% | 82.2% | 83.0% |
| Completed some college | 23.7% | 55.6% | 59.4% |
| Completed associate degree | 18.4% | 31.9% | 38.5% |
| Completed bachelors | 14.5% | 24.5% | 30.3% |
| Completed masters | 5.3% | 8.1% | 11.5% |
| Completed professional degree | 0.0% | 2.3% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marietta CDP. Using the proficiency score averages, the average test scores for Marietta CDP, OK schools is n/a. The average student to teacher ratio is n/a. In Marietta CDP, OK, an average of 96.1% of students have completed 8th grade and an average of 88.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Thackerville, OK | 400 | 25% | 47.9% |
| Burneyville, OK | 743 | 25% | 48.4% |
| Marietta, OK | 2,746 | 22% | 53.4% |
| Marietta CDP, OK | 149 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Starr, SC | 149 | 57% | 18.8% |
| Boones Mill, VA | 149 | 87% | 81.3% |
| San Lorenzo, NM | 149 | 55% | 14.6% |
| Blairsburg, IA | 149 | 70% | 45.8% |
| Nightmute, AK | 150 | 10% | 79.2% |
| Marietta CDP, OK | 149 | n/a |
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