| Index | Marathon | Texas | National |
| Average Test Scores | 60% | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Marathon | Texas | National |
| Completed 8th grade | 77.7% | 79.3% | 84.3% |
| Completed high school | 77.7% | 77.8% | 83.0% |
| Completed some college | 57.6% | 57.3% | 59.4% |
| Completed associate degree | 43.0% | 34.9% | 38.5% |
| Completed bachelors | 34.7% | 28.1% | 30.3% |
| Completed masters | 12.1% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marathon. Using the proficiency score averages, the average test scores for Marathon, TX schools is 60%. The average student to teacher ratio is n/a. In Marathon, TX, an average of 77.7% of students have completed 8th grade and an average of 77.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Marathon, TX | 365 | 60% | 25.0% |
| City | Population | Avg. Test Scores | National Avg. |
| La Valle, WI | 365 | 50% | 4.2% |
| Neosho Rapids, KS | 365 | 40% | 16.7% |
| North Carrollton, MS | 365 | 26% | 46.9% |
| Arcadia, NE | 364 | 53% | 9.4% |
| Belview, MN | 366 | 25% | 47.9% |
| Marathon, TX | 365 | 60% | 25.0% |
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