| 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 |


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| 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 | 200 | 80% | 66.7% |
| Baxter, IA | 963 | 77% | 60.4% |
| State Center, IA | 1,896 | 77% | 60.1% |
| Le Grand, IA | 873 | 75% | 56.3% |
| Green Mountain, IA | 186 | 75% | 55.2% |
| Marshalltown, IA | 27,894 | 58% | 20.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Elmira, NY | 27,860 | 30% | 36.9% |
| Eureka, CA | 27,853 | 39% | 18.8% |
| Magna, UT | 27,938 | 26% | 46.7% |
| Statesville, NC | 27,848 | 42% | 12.6% |
| Wilmette, IL | 27,840 | 66% | 37.2% |
| Marshalltown, IA | 27,894 | 58% | 20.7% |