J. B. Lenoir /ləˈnɔːr/ (March 5, 1929 – April 29, 1967) was an African American blues guitarist and singer-songwriter, active in the 1950s and 1960s Chicago blues scene.

Although his name is sometimes pronounced as French "Len WAH", Lenoir himself pronounced it "La NOR". The initials "J.B." had no specific meaning, his given name was simply "JB"