The New York City Police Department (NYPD) is structured into numerous bureaus and units. As a whole, the NYPD is headed by the Police Commissioner, a civilian administrator appointed by the Mayor, with the senior sworn uniformed officer of the service titled "Chief of Department". The Police Commissioner appoints a number of Deputy and Assistant Commissioners. The Department is divided into ten bureaus, six of which are enforcement bureaus. Each enforcement bureau is further sub-divided into sections, divisions, and units, and into patrol boroughs, precincts, and detective squads. Each Bureau is commanded by a Bureau Chief (such as the Chief of Patrol and the Chief of Housing). There are also a number of specialized units (such as the Operations Unit and CompStat) that are not part of any of the Bureaus and report to the Chief of the Department.
The Department is headed by and under the control of a civilian Police Commissioner, who is appointed by the Mayor of New York City. The current Police Commissioner is James P. O'Neill.
The Department's executive staff is divided into two areas: civilian and uniformed. The civilian staff are responsible for support services and departmental management, while uniformed officers investigate crimes and conduct law enforcement operations.
The following is the Department's hierarchy (with rank insignia): As of February, 2017:
The Patrol Services Bureau is one of the most visible units of the NYPD. The Bureau plans, directs, and coordinates the Department's uniformed officers in law enforcement patrol operations. Under the Chief of Patrol, there are eight Borough Commands, each headed by an Assistant Chief, with the exception of Patrol Bureau Manhattan South, which is currently headed by a 3-star chief. While each of the boroughs has at least one Patrol Borough Command, the boroughs of Manhattan, Queens and Brooklyn have two commands due to their sizes. The Borough Commands exercise authority over the various seventy-seven Police Precincts.
Each patrol borough is composed of precincts. Each precinct is responsible for safety and law enforcement within a designated geographic area. Police units based in these precincts patrol and respond to emergencies.
Staten Island now has four precincts: the 120th, 121st (new as of 2013), 122nd, and 123rd. There are plans to begin construction in 2014 on a new building for the 120th precinct.