Charles Mingus Jr. (April 22, 1922 – January 5, 1979) was a highly influential American jazz double bassist, composer and bandleader. Mingus's compositions retained the hot and soulful feel of hard bop and drew heavily from black gospel music while sometimes drawing on elements of Third Stream, free jazz, and classical music. Yet Mingus avoided categorization, forging his own brand of music that fused tradition with unique and unexplored realms of jazz. He once cited Duke Ellington and church as his main influences.

Mingus focused on collective improvisation, similar to the old New Orleans jazz parades, paying particular attention to how each band member interacted with the group as a whole. In creating his bands, he looked not only at the skills of the available musicians, but also their personalities. Many musicians passed through his bands and later went on to impressive careers. He recruited talented and sometimes little-known artists, whom he utilized to assemble unconventional instrumental configurations. As a performer, Mingus was a pioneer in double bass technique, widely recognized as one of the instrument's most proficient players.