"21st Century Breakdown" is a song by American rock band Green Day from their album of the same name.

Billie Joe Armstrong composed the song, which is mainly based on his personal life and musical influences.

According to David Fricke of Rolling Stone, its opening lyrics "Born into Nixon, I was raised in hell" refer to Armstrong's birth year of 1972, while "We are the class of the class of '13" references his eldest son Joseph's high school graduation year of 2013.

[6] On September 10, 2009, Green Day's official site announced that the song would be the band's next single.

It starts off with a wall with the spray-painted woman and man from the album art of 21st Century Breakdown.