The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, municipal police departments in the United States.
The NYPD is headquartered at 1 Police Plaza, located on Park Row in Lower Manhattan near City Hall. The NYPD's regulations are compiled in title 38 of the New York City Rules. Dedicated units of the NYPD include the Emergency Service Unit, K-9, harbor patrol, highway patrol, air support, bomb squad, counterterrorism, criminal intelligence, anti-organized crime, narcotics, mounted patrol, public transportation, and public housing units. Unlike in other towns and cities, it is not the fire department but the NYPD that has responsibility for emergency water rescue.