The Montgomery County Police Department (MCPD), is a nationally accredited agency and the primary law enforcement agency in Montgomery County, Maryland providing the full spectrum of police services to the entire county. It also provides aid and assistance to other police departments including Metropolitan Police Department of the District of Columbia, and in neighboring jurisdictions such as the District of Columbia, Howard County, Maryland and Prince George's County, Maryland as requested by authority.
- The Office of the Chief is responsible for the day-to-day activities of the MCPD. This section also contains Community Services, Internal Affairs, Legal and Labor, Media Services, and Stress Management.
- The Field Services Bureau contains the general policing districts and the Special Operations Division
- The Investigative Services Bureau is responsible for providing specialized police services such as (but not limited to) the following: Criminal Investigations Division (CID), Auto Theft, Fraud, Family Crimes, Major Crimes, and Special Investigations Division.
- The Management Services Bureau is a largely non-sworn, civilian support bureau. It contains Animal Control, Emergency Communications, Budget, Personnel, Training, and other support services.