Ontario is represented by 60 cities on CrimeMaps.ca with a combined 348K+ crime incidents from official open-data portals spanning 2015–2026. Severity rankings below use the official Statistics Canada CSI.
Crime data in Ontario comes from municipal police services and open-data portals. The province's 60 reporting cities vary in coverage period and category detail. York Region accounts for the largest share of reported incidents, followed by Halton Region.
Ontario cities ranked by the Statistics Canada Crime Severity Index (CSI). Per-category open-data rates are on the national and province ranking pages. See the methodology for sources and annualization rules.
| # | City | CSI 2024 | Violent CSI |
|---|---|---|---|
| 1 | Ottawa | 55.8 | 67.4 |
| 2 | Guelph | 56.0 | 77.6 |
| 3 | Brampton | 56.4 | 80.2 |
| 4 | Mississauga | 56.4 | 80.2 |
| 5 | Niagara Region | 59.0 | 78.5 |
| 6 | Peterborough | 61.3 | — |
| 7 | London | 65.9 | 81.8 |
| 8 | Hamilton | 66.2 | 85.9 |
| 9 | Greater Sudbury | 67.1 | 108.5 |
| 10 | Toronto | 68.7 | 99.8 |
| # | City | CSI 2024 | Violent CSI |
|---|---|---|---|
| 1 | Thunder Bay | 113.8 | 218.7 |
| 2 | Belleville | 85.0 | — |
| 3 | Brantford | 80.8 | 92.4 |
| 4 | Windsor | 80.3 | 96.3 |
| 5 | Chatham-Kent | 74.0 | 77.4 |
| 6 | Waterloo Region | 72.7 | 91.4 |
| 7 | Toronto | 68.7 | 99.8 |
| 8 | Greater Sudbury | 67.1 | 108.5 |
| 9 | Hamilton | 66.2 | 85.9 |
| 10 | London | 65.9 | 81.8 |