Marion Brown Quartet is an album by American saxophonist Marion Brown, his debut as a leader. It was recorded in November 1965 in New York City, and was released in 1966 on the ESP-Disk label. The album features Brown on alto saxophone, Alan Shorter on trumpet, Bennie Maupin on tenor saxophone, Reggie Johnson and Ronnie Boykins on bass, and Rashied Ali on drums.

Marion Brown was an American jazz alto saxophonist, composer, writer, visual artist, and ethnomusicologist. He was a member of the avant-garde jazz scene in New York City during the 1960s, playing alongside musicians such as John Coltrane, Archie Shepp, and John Tchicai. He performed on Coltrane's landmark 1965 album Ascension. AllMusic reviewer Scott Yanow described him as "one of the brightest and most lyrical voices of the 1960s avant-garde."