Henry Flynt (born 1940 in Greensboro, North Carolina) is an American philosopher, musician, writer, activist, and artist connected to the 1960s New York avant-garde. He coined the term "concept art" in the early 1960s, during which time he was associated with figures in the Fluxus scene. He later received attention for his anti-art demonstrations against New York cultural institutions in 1963 and 1964.
Since 1983, he has focused on philosophical writing related to nihilism, science, mathematical logic, post-capitalist economics, and personhood. A number of his archival musical recordings, which fuse hillbilly music with avant-garde techniques, were released in the 2000s. He has collaborated with artists such as C.C. Hennix, La Monte Young, George Maciunas, and John Berndt.