| Statistic | Reportedincidents | /100k people | Mount Vernon/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 838 (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) | 136 (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) | 702 (estimate) | 1,441 | 1,917 |


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| Item | Mount Vernon | Iowa | National |
| Law enforcement employees (officers & civilians) | 6 | 3,827 | 558,732 |
| Police officers & civilians /1000 residents | 1.3 | 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 |
| Solon, IA | 2,690 | 49 | 254 | 304 |
| Robins, IA | 3,510 | 53 | 274 | 328 |
| Ely, IA | 2,224 | 58 | 296 | 354 |
| Swisher, IA | 1,054 | 60 | 306 | 366 |
| North Liberty, IA | 19,159 | 114 | 274 | 389 |
| Tiffin, IA | 3,779 | 83 | 426 | 508 |
| Lisbon, IA | 2,138 | 86 | 444 | 530 |
| Mount Vernon, IA | 4,487 | 136 | 702 | 838 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Denton, MD | 4,488 | 564 | 2,256 | 2,820 |
| La Vale, MD | 4,486 | 338 | 1,646 | 1,984 |
| Ligonier, IN | 4,489 | 279 | 1,299 | 1,578 |
| Ottawa Hills, OH | 4,485 | 42 | 647 | 689 |
| Scottsville, KY | 4,489 | 178 | 1,710 | 1,887 |
| Mount Vernon, IA | 4,487 | 136 | 702 | 838 |