"Boulevard of Broken Dreams" is a song by American punk rock band Green Day, from their seventh studio album, American Idiot. The song was written by Green Day, with lyrics by lead singer Billie Joe Armstrong; it was co-produced by the band and Rob Cavallo. It was released as the album's second single on November 29, 2004 (2004-11-29); the single peaked at number two in the United States.

The song speaks from the point of view of American Idiot's main character, Jesus of Suburbia, and is a moderate midtempo song characterized by sombre and bleak lyrics. This is in contrast to the previous track on the album, "Holiday", which illustrates Jesus of Suburbia's high of being in The City. MTV's Green Day Makes a Video described "Holiday" as a party, and "Boulevard of Broken Dreams" as the subsequent hangover. "Boulevard of Broken Dreams" remains one of Green Day's signature songs.

It was ranked the #1 on the Reader's Choice: Singles of the Decade by Rolling Stone magazine in 2009 and #65 on the 100 Best Songs of the Decade list by Rolling Stone in 2009, too.