Ronald Shannon Jackson (January 12, 1940 – October 19, 2013) was an American jazz drummer from Fort Worth, Texas. A pioneer of avant-garde jazz, free funk, and jazz fusion, he appeared on over 50 albums as a bandleader, sideman, arranger, and producer. Jackson and bassist Sironeare the only musicians to have performed and recorded with the three prime shapers of free jazz: pianist Cecil Taylor, and saxophonists Ornette Coleman and Albert Ayler.

Musician, Player and Listener magazine writers David Breskin and Rafi Zabor called him “the most stately free-jazz drummer in the history of the idiom, a regal and thundering presence.” Gary Giddins wrote “Jackson is an astounding drummer, as everyone agrees…he has emerged as a kind of all-purpose new-music connoisseur who brings a profound and unshakably individual approach to every playing situation.”

In 1979, he founded his own group, the Decoding Society, playing what has been dubbed free funk: a blend of funk rhythm and free jazzimprovisation.

Jackson was born in Fort Worth, Texas. As a child, he was immersed in music. His father monopolized the local jukebox business and established the only African American-owned record store in the Fort Worth area. His mother played piano and organ at their local church. Between the ages of five and nine he took piano lessons. In the third grade, he studied music with John Carter.

Jackson graduated from I.M. Terrell High School, where he played with the marching band and learned about symphonic percussion. During lunch breaks, students would conduct jam sessions in the band room.