| Statistic | Reportedincidents | /100k people | Harper/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 2,175 (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) | 343 (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) | 1,832 (estimate) | 1,297 | 1,760 |


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| Item | Harper | 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 |
| Sigourney, IA | 1,953 | 0 | 0 | 0 |
| Wellman, IA | 1,463 | 87 | 465 | 552 |
| Pleasant Plain, IA | 105 | 253 | 1,349 | 1,602 |
| Millersburg, IA | 187 | 258 | 1,375 | 1,632 |
| North English, IA | 989 | 289 | 1,544 | 1,833 |
| Keota, IA | 862 | 292 | 1,559 | 1,851 |
| Richland, IA | 586 | 299 | 1,593 | 1,892 |
| Harper, IA | 99 | 343 | 1,832 | 2,175 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Twin Lakes CDP (Lake County), CO | 99 | 349 | 1,901 | 2,250 |
| Whitney, NE | 99 | 290 | 2,144 | 2,434 |
| Bow Valley, NE | 99 | 242 | 1,787 | 2,029 |
| Addington, OK | 99 | 567 | 2,649 | 3,216 |
| Plover, IA | 99 | 377 | 2,010 | 2,387 |
| Harper, IA | 99 | 343 | 1,832 | 2,175 |