"Spaceman" is a song by American rock band The Killers. The song was released as the second single from the band's third studio album Day & Age on November 4, 2008, as a digital download on iTunes, and as 7" and promo CD in the US, Canada and UK. It has been released to radio in Australia and has gone into regular rotation on Triple J. This song was number 17 on Rolling Stone's list of the 100 Best Songs of 2008. The song has been used regularly as the opening song during the band's tour.

The group began performing the song at shows during their Summer 2008 tour and played it as part of a two-song set on the October 4, 2008 episode of Saturday Night Live. They also performed the song on November 4, 2008 on BBC2's Later... with Jools Holland.

The song was featured in the Fringe episode "The No-Brainer", as well as on the trailer of the animated film Planet 51 starring Dwayne "The Rock" Johnson. The song was also released as a downloadable track for the music video game series Rock Band on November 25, 2008.

In the Los Angeles market this song was a big radio hit with radio airplay longevity into 2010. On KYSR 98.7 FM, it was their #1 most played song in June 2010, while KROQ 106.7 FM added the song back into regular rotation in May 2010 due to its regional popularity.

The music video was directed by American director Ray Tintori, and shows Brandon Flowers walking around a party in progress, happening on a unique tiered structure adorned with long white vertical lights. Many humanoid creatures (all dressed up in very colourful, carnival-like costumes) are dancing, occasionally as a group, but usually individually. The other three band members can also be seen at the party throughout the video. As more of the structure is revealed, it can be seen that it is in the middle of a wide open space, surrounded by the camera crew filming the video.

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