Cambridge Crime 2021
Cambridge · 2021 · updated 2026-11-12
Cambridge police open data lists 4,904 incidents for 2021, down 6.5% from 2020. That is about 4,047 incidents per 100,000 residents (average across the 42 US cities on TheCrimeMaps.com with complete 2021 data: 8,134). The most common crime types were other (39.6%), theft (26.9%), bike theft (12.5%). The busiest month was November (462) and the quietest March (351).
Crime types in 2021
| Crime type | Incidents | Share | vs prior year |
|---|---|---|---|
| Other | 1,943 | 39.6% | up 15.2% |
| Theft | 1,321 | 26.9% | up 4.2% |
| Bike theft | 613 | 12.5% | up 0.7% |
| Assault | 428 | 8.7% | up 14.4% |
| Fraud | 414 | 8.4% | down 64.2% |
| Auto theft | 120 | 2.4% | up 42.9% |
| Robbery | 64 | 1.3% | down 3.0% |
| Homicide | 1 | 0.0% | — |
Month by month
| Jan | 358 |
| Feb | 352 |
| Mar | 351 |
| Apr | 410 |
| May | 456 |
| Jun | 436 |
| Jul | 416 |
| Aug | 449 |
| Sep | 408 |
| Oct | 426 |
| Nov | 462 |
| Dec | 380 |
Neighborhoods with the most reports in 2021
- Cambridgeport 773 incidents
- North Cambridge 679 incidents
- Mid-Cambridge 563 incidents
- East Cambridge 562 incidents
- Riverside 505 incidents
- The Port 459 incidents
- Peabody 321 incidents
- West Cambridge 282 incidents
Counts are not adjusted for population or area.
Questions
How much crime was reported in Cambridge in 2021?
4,904 incidents for 2021 in Cambridge Police Department open data.
Did crime go up or down in Cambridge in 2021?
Reported incidents were down 6.5% from 2020.
Other years
Cambridge 2026 · Cambridge 2025 · Cambridge 2024 · Cambridge 2023 · Cambridge 2022 · Cambridge 2020
Source: Cambridge Police Department open data. Police-reported incidents, not convictions.