| Statistic | Reportedincidents | /100k people | Derby/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 2,472 (estimate) | 1,540 | 2,119 |
| Murder | n/a | n/a | n/a | 2.1 | 5.0 |
| Rape | n/a | n/a | n/a | 35.2 | 37.5 |
| Robbery | n/a | n/a | n/a | 18.7 | 60.6 |
| Assault | n/a | n/a | n/a | 187.2 | 256.1 |
| Violent crime | n/a | n/a (estimate) | 390 (estimate) | 243 | 359 |
| Burglary | n/a | n/a | n/a | 199.1 | 229.2 |
| Theft | n/a | n/a | n/a | 962.6 | 1,272.1 |
| Vehicle theft | n/a | n/a | n/a | 135.1 | 258.8 |
| Property crime | n/a | n/a (estimate) | 2,082 (estimate) | 1,297 | 1,760 |


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| Item | Derby | Iowa | National |
| Law enforcement employees (officers & civilians) | n/a | 3,827 | 558,732 |
| Police officers & civilians /1000 residents | n/a | 1.8 | 3.3 |
| State | Total offenders | Iowa /100K | National /100K |
| Iowa | 6,040 | 205 | 266 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Corydon, IA | 1,659 | 113 | 601 | 714 |
| Chariton, IA | 4,127 | 196 | 1,048 | 1,245 |
| Lucas, IA | 113 | 319 | 1,705 | 2,025 |
| Woodburn, IA | 119 | 337 | 1,799 | 2,136 |
| Humeston, IA | 449 | 339 | 1,810 | 2,149 |
| Russell, IA | 667 | 352 | 1,880 | 2,232 |
| Garden Grove, IA | 203 | 369 | 1,972 | 2,342 |
| Derby, IA | 113 | 390 | 2,082 | 2,472 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Barneston, NE | 113 | 308 | 2,275 | 2,582 |
| Prairie View, KS | 113 | 357 | 1,592 | 1,950 |
| Truesdale, IA | 113 | 393 | 2,096 | 2,489 |
| Banks Lake South, WA | 113 | 381 | 2,885 | 3,267 |
| Dante, SD | 113 | 456 | 2,000 | 2,456 |
| Derby, IA | 113 | 390 | 2,082 | 2,472 |