List of Law Enforcement Agencies in Long Island - New York City

New York City

• New York City Police Department
• New York City Fire Marshals (police officers)
  • 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)
• New York State Roosevelt Island Authority; Roosevelt Island Department of Public Safety (New York State sanctioned police force for Roosevelt Island) (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)
• Hunts Point Department of Public Safety (private police force for Hunts Point) (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 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.