| Statistic | Reportedincidents | /100k people | Armstrong/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 2,247 (estimate) | 1,721 | 2,281 |
| Murder | n/a | n/a | n/a | 2.5 | 5.7 |
| Rape | n/a | n/a | n/a | 41.3 | 38.0 |
| Robbery | n/a | n/a | n/a | 22.3 | 66.5 |
| Assault | n/a | n/a | n/a | 213.9 | 264.1 |
| Violent crime | n/a | n/a (estimate) | 366 (estimate) | 280 | 364 |
| Burglary | n/a | n/a | n/a | 218.6 | 250.7 |
| Theft | n/a | n/a | n/a | 1,056.8 | 1,347.2 |
| Vehicle theft | n/a | n/a | n/a | 165.2 | 318.7 |
| Property crime | n/a | n/a (estimate) | 1,882 (estimate) | 1,441 | 1,917 |


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| Item | Armstrong | 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 |
| Graettinger, IA | 1,044 | 129 | 665 | 794 |
| Dolliver, IA | 70 | 337 | 1,737 | 2,074 |
| Gruver, IA | 56 | 350 | 1,800 | 2,150 |
| Bancroft, IA | 719 | 356 | 1,833 | 2,190 |
| Fenton, IA | 232 | 368 | 1,892 | 2,260 |
| Lone Rock, IA | 179 | 390 | 2,009 | 2,400 |
| Burt, IA | 517 | 395 | 2,034 | 2,430 |
| Armstrong, IA | 846 | 366 | 1,882 | 2,247 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Rosedale, IN | 846 | 380 | 1,765 | 2,145 |
| Courtland, MS | 846 | 297 | 2,321 | 2,618 |
| Eden, MD | 846 | 682 | 3,316 | 3,998 |
| Cissna Park, IL | 847 | 403 | 2,235 | 2,638 |
| McGill, NV | 847 | 514 | 3,104 | 3,618 |
| Armstrong, IA | 846 | 366 | 1,882 | 2,247 |