J. B. Lenoir /ləˈnɔːr/ (Monticello, Mississippi, March 5, 1929 – Urbana, Illinois, April 29, 1967) was an African American blues guitarist and singer-songwriter, active in the 1950s and 1960s Chicago blues scene.
Lenoir's guitar-playing father introduced him to the music of Blind Lemon Jefferson, whose music became a major influence. During the early 1940s, Lenoir worked with blues artists Sonny Boy Williamson II and Elmore James in New Orleans. Lenoir would eventually find musical influence in Arthur Crudup and Lightnin' Hopkins.