"Atlantic" is a song performed and composed by English alternative rock band Keane, released as the first single from their second studio album Under the Iron Sea, firstly as a download only music video and later as a 7" Vinyl limited edition. The song was premiered at a secret gig in London on 5 April 2006.

"Atlantic" was featured in the TV series CSI: NY in the eighth episode of the third season "Consequences".

"Atlantic" was composed by Tim Rice-Oxley c. 2005 and recorded at the Helioscentric Studios, Rye, East Sussex and at the Magic Shop, New York City. First demos featured Rice-Oxley instead of Chaplin on the lead vocals. The first verse, lyrically, was different from the final version. Sessions at the Magic Shop for the recording of this song were filmed and released on the Under the Iron Sea DVD.

The first rhodes under the BMaj7 chord are played with Rice-Oxley's electric piano instrumentally. After 30 seconds, the bass and drums are added. Within 59 seconds, the shorter version appearing on the albums starts (running 19 seconds on that version). The weird intro of the drums was a particular reason for Rice-Oxley to include it on the album. Chaplin vocals are then introduced, without drums for 16 beats. Clocking 3:27 on the video and 2:32 on the album, the song drastically changes its tone to introduce the chorus and the final part, converting automatically the song in a ballad. While the album version fades with strings, the video version incorporates the outro of "The Iron Sea", with strange and electronic sounds including echoes and voices.

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