| Statistic | Reportedincidents | /100k people | Grenville/100k people | South Dakota/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | n/a (estimate) | 1,968 | 2,281 |
| Murder | n/a | n/a | n/a | 2.9 | 5.7 |
| Rape | n/a | n/a | n/a | 50.3 | 38.0 |
| Robbery | n/a | n/a | n/a | 20.4 | 66.5 |
| Assault | n/a | n/a | n/a | 276.1 | 264.1 |
| Violent crime | n/a | n/a (estimate) | n/a (estimate) | 350 | 364 |
| Burglary | n/a | n/a | n/a | 222.1 | 250.7 |
| Theft | n/a | n/a | n/a | 1,151.4 | 1,347.2 |
| Vehicle theft | n/a | n/a | n/a | 244.9 | 318.7 |
| Property crime | n/a | n/a (estimate) | n/a (estimate) | 1,618 | 1,917 |


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| Item | Grenville | South Dakota | National |
| Law enforcement employees (officers & civilians) | n/a | 995 | 558,732 |
| Police officers & civilians /1000 residents | n/a | 2.2 | 3.3 |
| State | Total offenders | South Dakota /100K | National /100K |
| South Dakota | n/a | n/a | n/a |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Webster, SD | 1,681 | 143 | 660 | 803 |
| Roslyn, SD | 221 | 430 | 1,986 | 2,416 |
| Ortley, SD | 58 | 484 | 2,237 | 2,721 |
| Waubay, SD | 530 | 496 | 2,294 | 2,791 |
| Grenville, SD | 71 | n/a | n/a | n/a |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Santiago, WA | 71 | 485 | 3,923 | 4,408 |
| Marysville, MT | 71 | 539 | 2,235 | 2,774 |
| Brooksburg, IN | 71 | 463 | 2,153 | 2,616 |
| Regina, NM | 71 | 936 | 3,608 | 4,544 |
| Durham, KS | 71 | 589 | 2,866 | 3,455 |
| Grenville, SD | 71 | n/a | n/a | n/a |