The Jazz Composer's Orchestra has been played over 10 times on NTS, first on 22 March 2015. The Jazz Composer's Orchestra's music has been featured on 13 episodes.

Jazz Composer's Orchestra was a jazz group founded in 1965 to further avant-garde jazz in New York, United States. Carla Bley and Michael Mantler were important in its organization and style.

Its origins lay in the Jazz Composers Guild, an organization founded by Bill Dixon which grew out of the series of 1964 concerts in New York, known as the "October Revolution in Jazz" and subsequent regular performance settings. A big band, formed by Bley and Mantler, became known as the Jazz Composers Guild Orchestra, which made its first record in April 1965. After the demise of the Guild, the big band continued as the Jazz Composer's Orchestra. A non-profit organisation was established in 1966, the Jazz Composers Orchestra Association Inc. (JCOA).

Their 1968 double-album Communications featured soloists Cecil Taylor, Don Cherry, Roswell Rudd, Pharoah Sanders, Larry Coryell, and Gato Barbieri.

JCOA Records was founded for released from the Orchestra and its members.

Albums included commissioned works by Roswell Rudd, Clifford Thornton, Don Cherry, Leroy Jenkins and Grachan Moncur III.

The group's last performance was in 1975.

The activities of the group JCOA led to the creation of an important record distribution company known as New Music Distribution Services or NMDS.