Nathan Riddles (February 4, 1952 – August 11, 1991} was an American blues harmonica player who played an important role in the New York blues scene during the late 1970s to mid-1980s. Born in Bronxville, a Westchester County suburb of New York, he was educated at Brooklyn College and the Pratt Institute. In the early 1980s, he became known in New York blues circles for his street performances with the guitarist Charlie Hilbert, as part of a free-form duo that he labeled 'El Cafe Street.' Riddles died of leukemia in August 1991 in Richmond, Virginia at the age of 39.