| Statistic | Reportedincidents | /100k people | Duncan/100k people | Nebraska/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 2,640 (estimate) | 2,206 | 2,281 |
| Murder | n/a | n/a | n/a | 3.2 | 5.7 |
| Rape | n/a | n/a | n/a | 48.4 | 38.0 |
| Robbery | n/a | n/a | n/a | 26.3 | 66.5 |
| Assault | n/a | n/a | n/a | 151.8 | 264.1 |
| Violent crime | n/a | n/a (estimate) | 275 (estimate) | 230 | 364 |
| Burglary | n/a | n/a | n/a | 169.5 | 250.7 |
| Theft | n/a | n/a | n/a | 1,389.5 | 1,347.2 |
| Vehicle theft | n/a | n/a | n/a | 417.1 | 318.7 |
| Property crime | n/a | n/a (estimate) | 2,365 (estimate) | 1,976 | 1,917 |


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| Item | Duncan | Nebraska | National |
| Law enforcement employees (officers & civilians) | n/a | 2,523 | 558,732 |
| Police officers & civilians /1000 residents | n/a | 2.1 | 3.3 |
| State | Total offenders | Nebraska /100K | National /100K |
| Nebraska | 6,070 | 345 | 266 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Columbus, NE | 23,291 | 107 | 1,389 | 1,497 |
| Lakeview, NE | 378 | 233 | 2,003 | 2,236 |
| Osceola, NE | 826 | 270 | 2,323 | 2,593 |
| Bellwood, NE | 415 | 271 | 2,332 | 2,604 |
| Platte Center, NE | 378 | 274 | 2,351 | 2,625 |
| Monroe, NE | 299 | 280 | 2,404 | 2,684 |
| Shelby, NE | 714 | 283 | 2,428 | 2,710 |
| Duncan, NE | 487 | 275 | 2,365 | 2,640 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Badger, MN | 487 | 400 | 2,610 | 3,011 |
| Canaseraga, NY | 487 | 572 | 2,640 | 3,212 |
| Arkansas City, AR | 487 | 846 | 3,040 | 3,885 |
| Bay View Gardens, IL | 487 | 430 | 2,387 | 2,817 |
| Mardela Springs, MD | 487 | 576 | 2,801 | 3,377 |
| Duncan, NE | 487 | 275 | 2,365 | 2,640 |