| Index | Marietta | Minnesota | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 2,224 | 79,221 |
| Total private schools | n/a | 477 | 24,874 |
| Total post-secondary schools | n/a | 140 | 7,963 |
| Index | Marietta | Minnesota | National |
| Completed 8th grade | 82.6% | 90.5% | 84.3% |
| Completed high school | 79.3% | 89.5% | 83.0% |
| Completed some college | 43.8% | 66.9% | 59.4% |
| Completed associate degree | 18.2% | 45.2% | 38.5% |
| Completed bachelors | 9.9% | 34.2% | 30.3% |
| Completed masters | 0.0% | 11.5% | 11.5% |
| Completed professional degree | 0.0% | 3.5% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marietta. Using the proficiency score averages, the average test scores for Marietta, MN schools is n/a. The average student to teacher ratio is n/a. In Marietta, MN, an average of 82.6% of students have completed 8th grade and an average of 79.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Madison, MN | 1,647 | 59% | 22.6% |
| Milbank, SD | 3,137 | 51% | 6.3% |
| Marietta, MN | 167 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Richey, MT | 167 | 50% | 4.2% |
| Hartly, DE | 167 | 62% | 29.2% |
| Port Wing, WI | 167 | 48% | 1.0% |
| Bethune, CO | 166 | 25% | 47.9% |
| Marshall, AK | 168 | 5% | 89.6% |
| Marietta, MN | 167 | n/a |
Here are the best places to live in Minnesota
See the best places to live in Marietta
These are the 10 cheapest cities in Minnesota
Most Dangerous Cities In The US