Law enforcement in Westchester County

Westchester County Department of Public Safety was created in 1979 by merging the Westchester County Sheriff's Office with the Westchester County Parkway Police. The current Commissioner/Sheriff is Terrance Raynor.

The department provides primary police coverage for county parks, parkways and facilities. It also patrols the Town of Mount Kisco and supplements the New York State Police in the Town of Cortlandt. The Department is the fourth largest law enforcement agency in Westchester County after the New York State Police, the Department of Corrections[1] and the City of Yonkers Police.[2]

In 2010, County Executive Robert P. Astorino announced a plan to merge the county departments of Public Safety and Emergency Services.[3] As of 2021 these departments remain separate, and the plan appears to have been abandoned.[4]

• Westchester County District Attorney's Office
• Westchester County Probation Department

The following departments are responsible for primary law enforcement in their jurisdictions.

• The SPCA of Westchester Humane Law Enforcement has jurisdiction throughout Westchester to enforce Animal Cruelty laws.
• New York State Police (has multiple barracks located in Westchester County, responsible for police services in the towns of Cortlandt, Lewisboro, North Salem, Somers and Pound Ridge, on state roads and major thoroughfares such as New York State Thruway, Taconic State Parkway, Interstate 684, Interstate 95 just to name a few as well as supplementing local police agencies with additional resources)
• New York State University Police at Purchase College
• New York State Park Police(responsible for patrol and security of all New York State Parks and Sites in Westchester County)
• New York State Department of Environmental Conservation Police (NYS DEC Police)
• New York City Department of Environmental Protection Police (NYC DEP Police) (Responsible for securing the NYC water supply system in Westchester County - i.e. NYC water shed located in Northern Westchester).
• Metropolitan Transportation Authority Police(MTA Police) (Responsible for security and patrol of Metro-North Railroad property).
• Amtrak Police
• Westchester County Department of Correction
• Westchester County Probation Department
• Westchester County District Attorney Investigations Squad
• Town of Pelham Constable
• Town of Rye Public Safety
• Mamaroneck Village Bay Constable

The City of Rye and Village of Mamaroneck employs seasonal bay constables who serve as peace officers. Constables patrol areas of Long Island Sound and enforce federal, state and local maritime navigation, environmental and fish and wildlife laws. Bay constables are armed and have the same powers as New York State Department of Environmental Conservation Police.

Several municipalities in Westchester have auxiliary police units which contains volunteers who are trained peace officers and assist their police departments with special events, traffic control, crowd control and patrol. Such auxiliary units have the powers of a peace officer "only during a period of imminent or actual attack by enemy forces and during drills authorized under section twenty-nine-b of article two-B of the executive law, providing for the use of civil defense forces in disasters" per NYS PL 2.10(26).

The Public Safety Emergency Force (PSEF) is the reserve unit within the Westchester County Department of Public Safety. The PSEF is composed of part-time deputy sheriffs. It is aligned with Westchester County Police Patrol Operations and reports directly to the commissioner/sheriff. All members are armed duly sworn peace officers and possess those powers to carry out their duties per NYS PL 2.10(57-a) and NYS PL 2.20. The PSEF is currently under the direct command of Chief Deputy Paul Soden.

• Ossining Town PD - The Village of Ossining Police provides police services to the unincorporated part of the Town of Ossining as well as the Village of Ossining.
• Cortlandt Town PD - disbanded and policed by the New York State Police augmented by the Westchester County Police
• Mount Kisco Town/Village PD - disbanded, officers merged with Westchester County Police, Mount Kisco is patrolled by Westchester County Police

List of law enforcement agencies in New York