| Index | Saint-Mathieu/100k people | Quebec/100k people | National/100k people | 
| Total crime | 1,716 (estimate) | 2,478 | 4,223 | 
| Violent crime | 582 (estimate) | 840 | 1,042 | 
| Property crime | 1,134 (estimate) | 1,638 | 3,181 | 
| Statistic | Saint-Mathieu | Quebec | National | 
| Total incidents | n/a | 308,070 | 2,225,600 | 
| Incidents per 100k | n/a | 3,593 | 5,856 | 
| Change in 100k rate | n/a | -11.6% | -9.8% | 
| Statistic | Saint-Mathieu | Quebec | National | 
| All (12+ years) | n/a | 1,469 | 1,709 | 
| Youths (12-17) | n/a | 1,205 | 1,108 | 
| Adults (18+) | n/a | 1,489 | 1,757 | 
| Statistic | Saint-Mathieu | Quebec | National | 
| Clearance rate | n/a | 45 | 37 | 
| Clearance rate change | n/a | -1.1% | 0.2% | 
| Clearance rate violent | n/a | 67 | 58 | 
| Clearance rate property | n/a | 31 | 27 | 
| Statistic | Saint-Mathieu | Quebec | National | 
| Total | n/a | -7.5% | -7.9% | 
| Violent | n/a | -0.8% | -3.6% | 
| Property | n/a | -11.2% | -9.8% | 
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people | 
| Hampstead, QC | 7,502 | 204 | 397 | 601 | 
| Montréal-Ouest, QC | 5,286 | 223 | 434 | 656 | 
| Westmount, QC | 22,392 | 233 | 455 | 688 | 
| Mont-Royal, QC | 22,238 | 233 | 455 | 688 | 
| Candiac, QC | 25,341 | 344 | 670 | 1,013 | 
| Carignan, QC | 11,123 | 355 | 693 | 1,048 | 
| Mercier, QC | 15,257 | 402 | 784 | 1,186 | 
| Saint-Mathieu, QC | 2,496 | 582 | 1,134 | 1,716 | 
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people | 
| Saint-Martin, QC | 2,495 | 746 | 1,454 | 2,200 | 
| Scott, QC | 2,498 | 641 | 1,249 | 1,890 | 
| Dufferin, MB | 2,498 | 1,349 | 3,546 | 4,895 | 
| Sainte-Catherine-de-Hatley, QC | 2,492 | 553 | 1,078 | 1,630 | 
| Akwesasne, QC | 2,500 | 714 | 1,392 | 2,106 | 
| Saint-Mathieu, QC | 2,496 | 582 | 1,134 | 1,716 |