| Index | Marshalltown | Iowa | National |
| Average Test Scores | 58% | 69% | 48% |
| Student/Teacher ratio | 15:1 | 13:1 | 16:1 |
| Total public schools | 9 | 1,101 | 79,221 |
| Total private schools | 1 | 208 | 24,874 |
| Total post-secondary schools | 3 | 96 | 7,963 |
| Index | Marshalltown | Iowa | National |
| Completed 8th grade | 77.4% | 89.2% | 84.3% |
| Completed high school | 75.7% | 87.7% | 83.0% |
| Completed some college | 49.6% | 59.8% | 59.4% |
| Completed associate degree | 27.0% | 38.4% | 38.5% |
| Completed bachelors | 19.5% | 27.2% | 30.3% |
| Completed masters | 6.2% | 8.7% | 11.5% |
| Completed professional degree | 1.7% | 2.7% | 3.3% |
| Completed doctorate | 1.0% | 1.1% | 1.3% |
There are a total of 9 public schools, 1 private schools and 3 post-secondary schools in Marshalltown. Using the proficiency score averages, the average test scores for Marshalltown, IA schools is 58%. The average student to teacher ratio is 15:1. In Marshalltown, IA, an average of 77.4% of students have completed 8th grade and an average of 75.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Laurel, IA | 194 | 80% | 66.7% |
| Baxter, IA | 935 | 77% | 60.4% |
| State Center, IA | 1,839 | 77% | 60.1% |
| Le Grand, IA | 842 | 75% | 56.3% |
| Green Mountain, IA | 182 | 75% | 55.2% |
| Marshalltown, IA | 26,957 | 58% | 20.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Belmont, CA | 26,963 | 79% | 65.5% |
| Bristol, TN | 26,973 | 42% | 12.8% |
| Eureka, CA | 26,938 | 39% | 18.8% |
| Shoreview, MN | 26,922 | 60% | 24.8% |
| Maryland Heights, MO | 26,996 | 60% | 25.0% |
| Marshalltown, IA | 26,957 | 58% | 20.7% |
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