| Abbreviation | Definition |
|---|---|
| MAST | Mutual Aid Support Team |
| MAWP | Minnesota Association of Women Police |
| MBA | Mighty Big Attitude |
| MBB | Men Behaving Badly |
| MBB | Moustache Bronx Brotherhood |
| MBPA | Metropolitan Black Police Association |
| MBPD | Miami Beach Police Department |
| MBPD | Morro Bay Police Department |
| MCA | Maritime & Coast Guard Agency |
| MCB | Major Crime Branch |
| MCB | Manhattan Central Booking |
| MCDC | Multnomah County Detention Center |
| MCET | Major Collision Enquiry Team |
| MCIT | Major Crime Investigation Team |
| MCPA | Minnesota Chiefs of Police Association |
| MCPA | MN Chiefs of Police Association |
| MCPD | Maui County Police Department |
| MCPD | Mixopolis City Police Department |
| MCPD | Montgomery County Police Department |
| MCSO | Macomb County Sheriff's Office |