The NYPD has a broad array of specialized services, including tactical operations, K-9, harbor patrol, air support, bomb disposal, counter-terrorism, intelligence, anti-gang, narcotics, public transportation, and public housing; The New York City Transit Police and Housing Police were fully integrated into the NYPD in 1995. NYPD has extensive crime scene investigation and laboratory resources, as well as units which assist with computer crime investigations. The NYPD runs an anticrime computer network, essentially a large search engine and data warehouse operated by detectives to assist officers in the field with their investigations. According to the department, its mission is to "enforce the laws, preserve the peace, reduce fear, and provide for a safe environment."

Members of the NYPD are frequently referred to by the nickname New York's Finest. The NYPD is headquartered at One Police Plaza located on Park Row across the street from City Hall.

In June 2004, there were about 40,000 sworn officers plus several thousand support staff; In June 2005, that number dropped to 35,000. As of November 2007, it had increased to slightly over 36,000 with the graduation of several classes from the Police Academy. The NYPD's current authorized uniformed strength is 37,838. There are also approximately 4,500 Auxiliary Police Officers, 5,000 School Safety Agents, 2,300 Traffic Enforcement Agents, and 370 Traffic Enforcement Supervisors currently employed by the department.

After years of bitter wrangling that saw starting pay for new officers fall to as low as $25,100 a year, the city and the Patrolmen's Benevolent Association on August 21, 2008 reached agreement on a new four-year contract.

The contract, which runs from August 1, 2006 to July 31, 2010, gives police officers a 17 percent pay raise over its four-year life, and raises starting pay from $35,881 to $41,975, and top pay from $65,382 to approximately $76,000 annually. With longevity pay, holiday pay, night shift differential and other additions, the total annual compensation for officers receiving top pay will be approximately $91,823, not including overtime. It should also be noted that this is the first contract since 1994 the Patrolmen's Benevolent Association and the City of New York mutually agreed on without involving a mediator.

While an improvement on the expired contract, the new terms still leave a substantial gap between the NYPD and nearby departments that pay considerably more, up to $50,000 for new hires and over $100,000 for more experienced officers. Over the years, thousands of city officers have left for higher paying jobs with other agencies, notably the Nassau County Police Department, the Suffolk County Police Department, Westchester County police departments, the Metropolitan Transportation Authority Police of New York and the Port Authority Police of New York and New Jersey. Discontent over pay issues has become so widespread and so well-known that higher-paying departments in lower cost-of-living areas, such as the Rochester, New York Police, the Albuquerque, New Mexico Police, and the Seattle Police Department, are actively recruiting NYPD officers to join their forces.

Police departments in nearby Rockland County and Westchester County have top base salaries ranging from around $85,000 to $105,000, not counting longevity, uniform pay, overtime and benefits. In 2007 a Westchester County Department of Public Safety officer reportedly made over $250,000 (with overtime), making him the highest paid police officer in the United States.

Large numbers of NYPD officers have also migrated to the New York City Fire Department, where, even though pay is comparable with that of the NYPD, work schedules are more attractive and relations with the public more amicable. Contract changes in 2006, however, now forbid the prior practice of allowing police officers who join the fire department to transfer their seniority for compensation purposes. With all new firefighters now compelled to begin working at the same starting pay, the number of NYPD officers "rolling over" to the FDNY is likely to fall considerably.

Some NYPD officers charge that the department's leadership is seeking to stem the flow of officers to other jurisdictions by administrative means. In January 2006, 35 NYPD officers seeking to move to the Port Authority Police sued the New York department, claiming that it was refusing to make their personnel records available to PAPD background investigators. The plaintiffs won an injunction at the trial level, but the Appellate Division in January 2007 overturned that ruling and ordered the case to trial.

For its part, the NYPD claims its actions are merely in line with the personnel practices of other employers and that there is no "stealth" effort to prevent officers from moving elsewhere. Nonetheless, it is a fact that no NYPD officers have been included in the last two PAPD police academy classes as a result.