"Ísjaki" (Icelandic for "Iceberg", pronounced [ˈiːsjacɪ]) is a song written and recorded by Icelandic post-rock band Sigur Rós for their seventh studio album Kveikur.

"Ísjaki" was released to Icelandic contemporary hit radio as a promotional single from Kveikur on April 24, 2013.

It was later released early on the Kveikur album listing on iTunes on April 25, 2013.

[1] A lyric video for the song was also released on April 24, 2013.

[1] Adapted from the Kveikur liner notes.