List of law enforcement agencies in Long Island Information & List of law enforcement agencies in Long Island Links at HealthHaven.com

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The List of Long Island law enforcement agencies provides an inclusive list of law enforcement agencies serving New York's Long Island. This includes those agencies serving the New York City boroughs of Brooklyn and Queens on the western portion of Long Island along with those serving the suburban counties of Nassau County and Suffolk County.

[edit] State agencies operating on Long Island

Metropolitan Transportation Authority Police (police officers)
- Long Island Rail Road Police (merged into Metropolitan Transportation Authority Police in 1997)
New York State Court Officers (peace officers)
New York State Department of Environmental Conservation Police (police officers)
New York State Forest Rangers (police officers)
New York State Office of Mental Health Police (peace officers)
New York State Office of Mental Retardation and Developmental Disabilities Police (peace officers)
New York State Park Police (police officers)
- Long Island State Parkway Police (merged into New York State Police and New York State Park Police in 1980)
New York State Police (police officers)
- Long Island State Parkway Police (merged into New York State Police and New York State Park Police in 1980)
Port Authority of New York and New Jersey Police Department (police officers)
State University of New York Police (police officers)
New York State DMV Division of Field Investigations (peace officers)

[edit] New York City

New York City Police Department
- New York City Police Department Auxiliary Police (peace officers)
New York City Sheriff's Office (peace officers)
New York City Marshals (peace officers)
New York City Department of Environmental Protection Police (police officers)
New York City Department of Sanitation Police (peace officers)
New York City Department of Health and Hospitals Police (peace officers)
New York City Parks Enforcement Patrol (peace officers)
New York City Taxi and Limousine Commission Inspectors (peace officers)
New York City Department of Investigation (peace officers)
New York City Department of City Administrative Services Police (peace officers)
New York City Department of Correction (peace officers)
New York City Department of Human Resources Administration Police (peace officers)
New York City Department of Homeless Services Police (peace officers)
City University of New York Public Safety Department (peace officers)
Big Six Towers Public Safety (private police force for the Big Six Towers housing community) (peace officers)
Co-op City Department of Public Safety (private police force for Co-op City, a private housing community in The Bronx) (peace officers)
Roosevelt Island Department of Public Safety (private police force for Roosevelt Island) (peace officers)
Seagate Police Department (private police force for Seagate) (peace officers)
Triborough Bridge and Tunnel Authority Police Department (peace officers)
Port Authority of New York and New Jersey Police Department (police officers)
Metropolitan Transportation Authority Police (police officers)
ASPCA Humane Law Enforcement Division (peace officers)
New York Society for the Prevention of Cruelty to Children Law Enforcement officers (peace officers)
New York City Administration of Childrens Services Police (peace officers)

The New York City Transit Police and the New York City Housing Authority Police were merged into the NYPD in 1995, the Brooklyn Police Department and the Long Island City Police Department in 1898 and the Town of Morrisania Police Department in 1879.

Each of the five counties of New York City — New York (Manhattan), Bronx, Richmond (Staten Island), Kings (Brooklyn) and Queens — had a county sheriff's department. In 1942 they were merged together to form the New York City Sheriff's Office. In 1939 the corrections part of the individual county sheriff's office's became the separate New York City Department of Correction.