| 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 | 959 | 108 | 539 | 647 |
| Eagle Grove, IA | 3,541 | 134 | 717 | 851 |
| Vincent, IA | 125 | 251 | 1,341 | 1,592 |
| Badger, IA | 463 | 252 | 1,346 | 1,598 |
| Webster City, IA | 7,995 | 286 | 1,328 | 1,615 |
| Coalville, IA | 660 | 271 | 1,446 | 1,717 |
| Dayton, IA | 860 | 275 | 1,466 | 1,741 |
| Duncombe, IA | 349 | 300 | 1,601 | 1,901 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Keyport, WA | 349 | 138 | 1,041 | 1,179 |
| Mooreland, IN | 349 | 436 | 1,922 | 2,359 |
| Kempton, IN | 349 | 423 | 1,864 | 2,287 |
| Bunceton, MO | 349 | 645 | 2,708 | 3,352 |
| Preston, MO | 349 | 698 | 2,932 | 3,630 |
| Duncombe, IA | 349 | 300 | 1,601 | 1,901 |