| Statistic | Reportedincidents | /100k people | Cos Cob/100k people | Connecticut/100k people | National/100k people |
| Total crime | 0 | n/a (estimate) | 555 (estimate) | 1,709 | 2,281 |
| Murder | n/a | n/a | n/a | 3.7 | 5.7 |
| Rape | n/a | n/a | n/a | 20.1 | 38.0 |
| Robbery | n/a | n/a | n/a | 43.4 | 66.5 |
| Assault | n/a | n/a | n/a | 83.0 | 264.1 |
| Violent crime | n/a | n/a (estimate) | 49 (estimate) | 150 | 364 |
| Burglary | n/a | n/a | n/a | 127.8 | 250.7 |
| Theft | n/a | n/a | n/a | 1,138.7 | 1,347.2 |
| Vehicle theft | n/a | n/a | n/a | 292.0 | 318.7 |
| Property crime | n/a | n/a (estimate) | 507 (estimate) | 1,558 | 1,917 |


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| Item | Cos Cob | Connecticut | National |
| Law enforcement employees (officers & civilians) | n/a | 5,593 | 558,732 |
| Police officers & civilians /1000 residents | n/a | 2.6 | 3.3 |
| State | Total offenders | Connecticut /100K | National /100K |
| Connecticut | 6,088 | 184 | 266 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Wilton Center, CT | 1,808 | 21 | 219 | 240 |
| Georgetown, CT | 1,251 | 21 | 219 | 240 |
| Glenville, CT | 2,976 | 24 | 244 | 268 |
| Katonah, NY | 1,706 | 55 | 252 | 307 |
| Old Brookville, NY | 1,791 | 55 | 252 | 307 |
| Baxter Estates, NY | 1,076 | 55 | 252 | 307 |
| Huntington Bay, NY | 1,614 | 55 | 252 | 307 |
| Cos Cob, CT | 7,065 | 49 | 507 | 555 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Delphos, OH | 7,066 | 272 | 1,608 | 1,880 |
| Hewlett, NY | 7,064 | 129 | 594 | 723 |
| Hudson Falls, NY | 7,067 | 441 | 2,034 | 2,475 |
| Clarkston Heights-Vineland, WA | 7,062 | 239 | 1,936 | 2,175 |
| Orland Hills, IL | 7,069 | 198 | 1,099 | 1,297 |
| Cos Cob, CT | 7,065 | 49 | 507 | 555 |