Cheers is an American sitcom television series that ran on NBC from September 30, 1982, to May 20, 1993, with a total of 275 half-hour episodes across 11 seasons. The show was produced by Charles/Burrows/Charles Productions in association with Paramount Network Television, and was created by the team of James Burrows and Glen and Les Charles. The show is set in a real-life bar and namesake Cheers in Boston, where a group of locals meet to drink, relax and socialize.

At the center of the show was the bar's owner and head bartender, Sam Malone, who was a womanizing former relief pitcher for the Boston Red Sox. The show's ensemble cast introduced in the pilot episode were waitresses Diane Chambers and Carla Tortelli, second bartender Coach Ernie Pantusso, and regular customers Norm Peterson and Cliff Clavin. Later main characters of the show also included Frasier Crane, Woody Boyd, Lilith Sternin and Rebecca Howe.

After premiering in 1982, it was nearly canceled during its first season when it ranked almost last in ratings for its premiere (74th out of 77 shows). However, Cheers eventually became a Nielsen ratings juggernaut in the United States, earning a top-ten rating during eight of its 11 seasons, including one season at number one (season 9). The show spent most of its run on NBC's Thursday night "Must See TV" lineup. Its widely watched series finale was broadcast in 1993 to become the most watched single episode of the 1990s, and the show's 275 episodes have been successfully syndicated worldwide. Nominated for Outstanding Comedy Series for all 11 of its seasons on the air, it earned 28 Primetime Emmy Awards from a record of 117 nominations.

During its run, Cheers became one of the most popular series in history and received critical acclaim from its start to its end. In 1997, the episodes "Thanksgiving Orphans" and "Home Is the Sailor", aired originally in 1987, were respectively ranked No. 7 and No. 45 on TV Guide's 100 Greatest Episodes of All Time. Its series finale was watched by an estimated 93 million viewers, almost 40% of the US population at the time. In 2002, Cheers was ranked No. 18 on TV Guide's 50 Greatest TV Shows of All Time. In 2013, the Writers Guild of America ranked it as the eighth-best-written TV series and TV Guide ranked it No. 11 on their list of the 60 greatest shows.