Raymond Walter Kelly is an American police officer who was the longest-serving Commissioner in the history of the New York City Police Department (NYPD) and the first person to hold the post for two non-consecutive tenures. According to its website, Kelly, a lifelong New Yorker, had spent 45 years in the NYPD, serving in 25 different commands and as Police Commissioner from 1992 to 1994 and again from 2002 until 2013. Kelly was the first man to rise from Police Cadet to Police Commissioner, holding all of the department's ranks, except for Three-Star Bureau Chief, Chief of Department and Deputy Commissioner, having been promoted directly from Two-Star Chief to First Deputy Commissioner in 1990. After his handling of the World Trade Center bombing in 1993, he was mentioned for the first time as a possible candidate for FBI Director. After Kelly turned down the position, Louis Freeh was appointed.

The New York City Police Commissioner is the head of the New York City Police Department and presiding member of the Board of Commissioners. The commissioner is appointed by and serves at the pleasure of the mayor. The commissioner is responsible for the day-to-day operations of the department as well as the appointment of deputies including the Chief of Department and subordinate officers. Commissioners are civilian administrators, and they and their subordinate deputies are civilians under an oath of office, not sworn members of the force. This is a separate position from the Chief of Department, who is the senior sworn uniformed member of the force. The First Deputy Commissioner is the Commissioner and department's second-in-command. The office of the Police Commissioner is located at the NYPD Headquarters, One Police Plaza. Both the commissioner and first deputy commissioner outrank all uniformed officers, including the chief of department.