The Wire is an American crime drama television series created and primarily written by American author and former police reporter David Simon for the cable network HBO. The series premiered on June 2, 2002, and ended on March 9, 2008, comprising 60 episodes over five seasons. The idea for the show started out as a police drama loosely based on the experiences of Simon's writing partner Ed Burns, a former homicide detective and public school teacher.

Set and produced in Baltimore, Maryland, The Wire introduces a different institution of the city and its relationship to law enforcement in each season while retaining characters and advancing storylines from previous seasons. The five subjects are, in chronological order; the illegal drug trade, the port system, the city government and bureaucracy, education and schools, and the print news medium. Simon chose to set the show in Baltimore because of his familiarity with the city.

When the series first aired, the large cast consisted mainly of actors who were unknown to television audiences, as well as numerous real-life Baltimore and Maryland figures in guest and recurring roles. Simon has said that despite its framing as a crime drama, the show is "really about the American city, and about how we live together. It's about how institutions have an effect on individuals. Whether one is a cop, a longshoreman, a drug dealer, a politician, a judge or a lawyer, all are ultimately compromised and must contend with whatever institution to which they are committed."

The Wire is lauded for its literary themes and its uncommonly accurate exploration of society, politics and urban life. Despite this, the series received only average ratings and never won any major television awards during its original run. In the years following its release, the show has cultivated a cult following, and is now widely regarded as one of the greatest television series of all time.