| Index | Colwell | 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 | Colwell | Iowa | National |
| Completed 8th grade | 94.3% | 89.2% | 84.3% |
| Completed high school | 94.3% | 87.7% | 83.0% |
| Completed some college | 48.6% | 59.8% | 59.4% |
| Completed associate degree | 34.3% | 38.4% | 38.5% |
| Completed bachelors | 11.4% | 27.2% | 30.3% |
| Completed masters | 0.0% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 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 Colwell. Using the proficiency score averages, the average test scores for Colwell, IA schools is n/a. The average student to teacher ratio is n/a. In Colwell, IA, an average of 94.3% of students have completed 8th grade and an average of 94.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| New Hampton, IA | 3,413 | 77% | 60.1% |
| Nashua, IA | 1,448 | 76% | 57.8% |
| Osage, IA | 3,549 | 70% | 45.1% |
| Riceville, IA | 860 | 63% | 31.8% |
| Charles City, IA | 7,351 | 54% | 11.8% |
| Colwell, IA | 60 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Zalma, MO | 60 | 45% | 5.7% |
| Igiugig, AK | 60 | 50% | 4.2% |
| Lee Vining, CA | 59 | 43% | 11.5% |
| Menoken, ND | 61 | 60% | 25.0% |
| Fishers Island, NY | 61 | 80% | 66.7% |
| Colwell, IA | 60 | n/a |
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