The John Cage Trust was established in 1993 as a not-for-profit institution whose mission is to gather together, organize, preserve, disseminate, and generally further the work of the late American composer, John Cage. Its founding trustees were Merce Cunningham, Artistic Director of the Cunningham Dance Company, Anne d'Harnoncourt, Director of the Philadelphia Museum, and David Vaughan, Archivist of the Cunningham Dance Foundation, all long-time Cage friends and associates.

The John Cage Trust functions as both a business concern and an archive and repository for Cage's work. In the latter capacity, it maintains sizeable collections of music, text, and visual art manuscripts. It also houses extensive audio, video, and print libraries, which are continually expanding, as well as a substantial permanent collection of visual art works by John Cage, which are made available for exhibitions worldwide. The John Cage Trust also works closely with others in the promotion and placement of Cage's work, including archival restoration, remastering, and working on new projects that contribute to the continuing relevance of Cage's work.