Mark Edward Kozelek (born January 24, 1967) is an American singer, songwriter, guitarist, record producer and occasional actor. He is the vocalist and primary recording artist of the indie folk act Sun Kil Moon and was a founding member of the indie rock band Red House Painters, with whom he recorded six studio albums from 1988 until 2001.

Upon meeting drummer Anthony Koutsos in Atlanta, Georgia, the pair moved to San Francisco, California and formed Red House Painters alongside guitarist Gorden Mack and bass guitarist Jerry Vessel. Signing with record label 4AD, the band released four studio albums. In 1996, Kozelek recorded the band's fifth studio album, Songs for a Blue Guitar, mostly alone. The release of the band's final studio album, Old Ramon (2001), was delayed for three years. In the interim, Kozelek recorded both an album and an EP of AC/DC cover songs.

Reconvening with Koutsos and Vessel, the trio continued performing under the new name of Sun Kil Moon, releasing their debut album, Ghosts of the Great Highway, in 2003. Inspired by classical guitar music, Kozelek recorded Sun Kil Moon's fourth studio album, Admiral Fell Promises (2010), as a solo act and continued to record mostly alone on its follow-up, Among the Leaves (2012), and later Perils from the Sea and Mark Kozelek & Desertshore, both released in 2013. In 2014, Sun Kil Moon's sixth studio album, Benji, was released to widespread critical acclaim, and increased exposure with its follow-up, 2015's Universal Themes, featuring lengthy compositions and stream-of-consciousness lyrics.

Across his work in Sun Kil Moon, Red House Painters, and his own solo material, Kozelek has released 31 studio albums, with his most recent being All the Best, Isaac Hayes (2020). A number of commentators have described Kozelek as one of the greatest songwriters of his generation.

Kozelek was born on January 24, 1967 in Massillon, Ohio. In his teenage years, he led a band named God Forbid. Upon relocating to Atlanta, Georgia, he met drummer Anthony Koutsos. After the pair moved once again to San Francisco, California, Red House Painters formed with the addition of guitarist Gorden Mack and bassist Jerry Vessel. From 1992 to 1996, Red House Painters released a series of acclaimed albums, showcasing Kozelek's intense, highly autobiographical songs.

However, Kozelek's parting with the record label 4AD, followed by a major label merger which left Red House Painters' 1998 album Old Ramon on the shelf, proved highly frustrating and stifled the group's momentum.

In 2000, he released the solo EP Rock 'n' Roll Singer, which featured three original songs as well as covers of John Denver's "Around and Around" and three AC/DC songs ("Rock 'n' Roll Singer," "Bad Boy Boogie," and "You Ain't Got a Hold on Me"). Two of the AC/DC cover versions on Rock 'n' Roll Singer were radical re-arrangements of the originals which removed the Bon Scott-penned lyrics from their hard rock context and placed them into gentle, acoustic "folk ballad" settings.

Kozelek expanded on this idea in 2001, releasing a full-length album composed solely of AC/DC covers titled What's Next to the Moon.