"Uno" is a song by English alternative rock band Muse, featured on their 1999 debut studio album Showbiz. When released as the album lead single, it was well received by critics, but only reached number seventy-three on the UK Singles Chart.

The song originally featured on Muse's second EP Muscle Museum EP. During recording, the amp used for the guitar blew up. This also happened with other songs while recording Showbiz. "Uno" was issued on 7" vinyl (backed with "Agitated") and partially transparent CD (with the B-sides "Jimmy Kane" and "Forced In"). Also, an acoustic version of the song was released on standard 7" vinyl.

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