Jackie-O Motherfucker is an American experimental rock group that formed in Portland, Oregon in 1994.

Jackie-O Motherfucker began as a duo consisting of multi-instrumentalist Tom Greenwood and saxophonist Nester Bucket. The group has had more than forty members, most of which have quit due to Greenwood's impulsive behavior, drawn from the U.S. experimental scene. As of 2008, the core of the group is founding member Greenwood.

Jackie-O Motherfucker's music draws from a variety of subgenres including various folk musics of the world (American folk and blues, Native American song, Traditional English folk ballads, etc), drone, free jazz, and space-rock, and is heavily improvisational in its nature. Because they are a collective, rather than a consistent band or group, the sound of their music can change from performance to performance. The group operates its own label of CD-R live recordings, the U-Sound Archive, which features concert recordings from Jackie-O Motherfucker as well as like-minded subterranean artists such as Double Leopards, Sunroof!, Decaer Pinga, and Vibracathedral Orchestra.

The group's first three albums were limited-run vinyl-only releases on now-defunct Portland label Imp Records. Since then, the group has had recordings released by many different labels from around the world before settling down with the London based label Fire Records.

The group has been on several international tours, including several performances at All Tomorrow's Parties Festivals. Several albums released by the group are from live shows, which stand apart from their other releases due to the improvisational nature.

• Alchemy... Shit To Gold (1995), Imp Records
• Cross Pollinate (1996), Imp Records
• Flat Fixed (1998), Imp Records
• WOW (1999), Fisheye
• Fig. 5 (2000), Road Cone
• The Magick Fire Music (2001), Ecstatic Peace!
• Liberation (2001), Road Cone
• split with Vibracathedral Orchestra (2001), Textile
• Change (2002), Textile
• Europe 2002 live album (2003), Cast Exotic
• From The Earth To The Spheres Vol. 3 with My Cat Is An Alien (2005), Very Friendly
• Flags Of The Sacred Harp (2005), ATP Recordings
• The Grave (2006), DotDotDot
• America Mystica (2006), Very Friendly
• Freaker Pipe (2007), U-Sound
• Valley Of Fire (2007), Textile Records
• Fig. 5 (2007), ATP (reissue of 2000 album)
• The Blood Of Life Live Album (2008), Fire Records
• Ballads of the Revolution (2009) Fire

• Tom Greenwood – guitar, turntables, percussion, vocals
• Honey Owens – vocals, guitar, keyboards
• Eva Salens - vocals, keyboards, viola, tapes
• Dana Valatka – vocals, electronic percussion
• Nick Bindeman – guitar
• Brooke Crouser – guitar
• Danny Sasaki – drums

Previous members

• Jef Brown – guitar, saxophone
• John Flaming – saxophone
• Nester Bucket – saxophone
• Jessie Carrot – drums
• Barry Hampton – drums, percussion
• Adam Forkner – guitar
• Natalie Mering – vocals, guitar
• Josh Stevenson - bass, keyboards, guitar
• Theo Angel - vocals, guitars, tapes

• MySpace profile