John A. Lomax Jr. (June 14, 1907 – December 12, 1974) was an American folklorist, performer, and land developer. He co-founded the Houston Folklore & Music Society and contributed to the preservation and publication of folklore and folk music during the 20th century, continuing the work of his father and brother. Lomax once defined folk music as "a story in song written no one knows when, no one knows where, no one knows by whom or even why."