| Index | Marthasville | Missouri | National |
| Average Test Scores | 47% | 44% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | Marthasville | Missouri | National |
| Completed 8th grade | 90.3% | 86.0% | 84.3% |
| Completed high school | 90.3% | 84.2% | 83.0% |
| Completed some college | 63.1% | 57.7% | 59.4% |
| Completed associate degree | 32.1% | 35.2% | 38.5% |
| Completed bachelors | 19.9% | 27.6% | 30.3% |
| Completed masters | 5.2% | 10.4% | 11.5% |
| Completed professional degree | 0.8% | 2.8% | 3.3% |
| Completed doctorate | 0.4% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marthasville. Using the proficiency score averages, the average test scores for Marthasville, MO schools is 47%. The average student to teacher ratio is n/a. In Marthasville, MO, an average of 90.3% of students have completed 8th grade and an average of 90.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lake St. Louis, MO | 16,357 | 71% | 48.4% |
| Wentzville, MO | 40,407 | 58% | 20.1% |
| Augusta, MO | 284 | 57% | 18.8% |
| New Haven, MO | 2,819 | 56% | 16.9% |
| Foristell, MO | 881 | 55% | 13.5% |
| Marthasville, MO | 2,410 | 47% | 2.1% |
| City | Population | Avg. Test Scores | National Avg. |
| North Conway, NH | 2,410 | 45% | 7.3% |
| Hudson, IA | 2,409 | 81% | 68.2% |
| Eddystone, PA | 2,407 | 47% | 2.1% |
| Rineyville, KY | 2,407 | 53% | 10.4% |
| Marengo, IA | 2,407 | 81% | 68.2% |
| Marthasville, MO | 2,410 | 47% | 2.1% |
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