| Index | Marble Rock | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Marble Rock | Iowa | National |
| Completed 8th grade | 80.7% | 89.2% | 84.3% |
| Completed high school | 78.0% | 87.7% | 83.0% |
| Completed some college | 42.2% | 59.8% | 59.4% |
| Completed associate degree | 15.7% | 38.4% | 38.5% |
| Completed bachelors | 7.6% | 27.2% | 30.3% |
| Completed masters | 4.0% | 8.7% | 11.5% |
| Completed professional degree | 0.4% | 2.7% | 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 Marble Rock. Using the proficiency score averages, the average test scores for Marble Rock, IA schools is n/a. The average student to teacher ratio is n/a. In Marble Rock, IA, an average of 80.7% of students have completed 8th grade and an average of 78.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Rockford, IA | 827 | 75% | 55.2% |
| Allison, IA | 1,134 | 75% | 55.2% |
| Clarksville, IA | 1,345 | 75% | 55.2% |
| Nora Springs, IA | 1,648 | 67% | 39.1% |
| Greene, IA | 1,182 | 65% | 34.4% |
| Marble Rock, IA | 322 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Optima, OK | 322 | 25% | 47.9% |
| Niobrara, NE | 322 | 22% | 54.7% |
| Cerro Gordo, NC | 322 | 39% | 18.2% |
| Bridgewater, SD | 322 | 70% | 44.8% |
| Juda, WI | 322 | 40% | 17.2% |
| Marble Rock, IA | 322 | n/a |
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