"Won't Get Fooled Again" is a rock song by the British band The Who. It originally appeared on the 1971 album Who's Next, and has since appeared on various other recordings, including the live compilation soundtrack for The Kids Are Alright (a documentary film about the band). The song is quite long, ranging from eight to nine minutes depending on the version being listened to. A shortened single was also released for use on broadcast radio.

Like many songs, the meaning has been debated by listeners for a long time. One interpretation is that it expresses disenchantment with the counterculture and supposed "revolution" of the 1960s. The song's final lines are "Meet the new boss, same as the old boss," which many take to be an expression of disgust with the results of the revolution.

This was the last song performed live by original drummer Keith Moon. Shortly after recording the song on a soundstage for The Kids Are Alright, he died in his sleep by an overdose of medication to control his alcoholism.

"Won't Get Fooled Again" is used as the theme song for the CBS television series CSI: Miami.