Sun Kil Moon is an American folk rock act from San Francisco, California, founded in 2002. Initially a continuation of the defunct indie rock band Red House Painters, Sun Kil Moon is now the primary recording moniker of vocalist and guitarist Mark Kozelek. The project is named after the Korean lightweight boxer Sung-Kil Moon.

Following the delayed release of Red House Painters' final studio album, Old Ramon (2001), vocalist and guitarist Kozelek began recording new material under the name Sun Kil Moon with bandmates Jerry Vessel (bass) and Anthony Koutsos (drums). The resulting album, Ghosts of the Great Highway, was released in 2003 to widespread critical acclaim. The project's second studio album, Tiny Cities (2005), was composed entirely of Modest Mouse cover songs.