| Statistic | Reportedincidents | /100k people | Duncombe/100k people | Iowa/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 1,901 (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) | 300 (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) | 1,601 (estimate) | 1,297 | 1,760 |


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| Item | Duncombe | 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 |
| Gowrie, IA | 932 | 108 | 539 | 647 |
| Eagle Grove, IA | 3,410 | 134 | 717 | 851 |
| Vincent, IA | 123 | 251 | 1,341 | 1,592 |
| Badger, IA | 448 | 252 | 1,346 | 1,598 |
| Webster City, IA | 7,699 | 286 | 1,328 | 1,615 |
| Coalville, IA | 645 | 271 | 1,446 | 1,717 |
| Dayton, IA | 839 | 275 | 1,466 | 1,741 |
| Duncombe, IA | 341 | 300 | 1,601 | 1,901 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Beaver Creek, MN | 341 | 280 | 1,748 | 2,028 |
| Towanda, IL | 341 | 289 | 1,713 | 2,002 |
| Saginaw, MO | 341 | 471 | 1,979 | 2,449 |
| Edmundson Acres, CA | 341 | 730 | 3,121 | 3,851 |
| Duanesburg, NY | 341 | 343 | 1,553 | 1,896 |
| Duncombe, IA | 341 | 300 | 1,601 | 1,901 |