| Index | Derby | 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 |
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| Index | Derby | Iowa | National |
| Completed 8th grade | 76.7% | 89.2% | 84.3% |
| Completed high school | 76.7% | 87.7% | 83.0% |
| Completed some college | 50.0% | 59.8% | 59.4% |
| Completed associate degree | 17.8% | 38.4% | 38.5% |
| Completed bachelors | 2.2% | 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 Derby. Using the proficiency score averages, the average test scores for Derby, IA schools is n/a. The average student to teacher ratio is n/a. In Derby, IA, an average of 76.7% of students have completed 8th grade and an average of 76.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Corydon, IA | 1,659 | 73% | 52.6% |
| Garden Grove, IA | 203 | 70% | 45.8% |
| Chariton, IA | 4,127 | 69% | 43.1% |
| Humeston, IA | 449 | 55% | 13.5% |
| Derby, IA | 113 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Brussels, IL | 113 | 35% | 27.1% |
| Corona, NM | 113 | 58% | 19.8% |
| Whitewater, MT | 112 | 50% | 4.2% |
| Bartlett, NE | 114 | 45% | 6.3% |
| Mount Erie, IL | 114 | 40% | 16.7% |
| Derby, IA | 113 | n/a |
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